<p>Burl fled, without debate, and nearly collided with one of the
anchoring cables of the web from which he had barely escaped a moment
before. He heard the shrill sound behind him suddenly subside. The ant,
short-sighted as all ants were, no longer felt itself threatened and
went peacefully about the business Burl had interrupted, that of finding
among the gruesome relics beneath the spider's web some edible carrion
which might feed the inhabitants of its city.</p>
<p>Burl sped on for a few hundred yards, and stopped. It behooved him to
move carefully. He was in strange territory, and as even the most
familiar territory was full of sudden and implacable dangers, unknown
lands were doubly or trebly perilous.</p>
<p>Burl, too found difficulty in moving. The glutinous stuff from the
spider's shroud of silk still stuck to his feet and picked up small
objects as he went along. Old ant-gnawed fragments of insect armour
pricked him even through his toughened soles.</p>
<p>He looked about cautiously and removed them, took a dozen steps and had
to stop again. Burl's brain had been uncommonly stimulated of late. It
had gotten him into at least one predicament—due to his invention of a
spear—but had no less readily led to his escape from another. But for
the reasoning that had led him to use the grease from the fish upon his
shoulder in oiling his body when he struggled out of the spider's snare,
he would now be furnishing a meal for that monster.</p>
<p>Cautiously, Burl looked all about him. He seemed to be safe. Then, quite
deliberately, he sat down to think. It was the first time in his life
that he had done such a thing. The people of his tribe were not given to
meditation. But an idea had struck Burl with all the force of
inspiration—an abstract idea.</p>
<p>When he was in difficulties, something within him seemed to suggest a
way out. Would it suggest an inspiration now? He puzzled over the
problem. Childlike—and savage-like—the instant the thought came to
him, he proceeded to test it out. He fixed his gaze upon his foot. The
sharp edges of pebbles, of the remains of insect-armour, of a dozen
things, hurt his feet when he walked. They had done so ever since he had
been born, but never had his feet been sticky so that the irritation
continued with him for more than a single step.</p>
<p>Now he gazed upon his foot, and waited for the thought within him to
develop. Meanwhile, he slowly removed the sharp-pointed fragments, one
by one. Partly coated as they were with the half-liquid gum from his
feet, they clung to his fingers as they had to his feet, except upon
those portions where the oil was thick as before.</p>
<p>Burl's reasoning, before, was simple and of the primary order. Where oil
covered him, the web did not. Therefore he would coat the rest of
himself with oil. Had he been placed in the same predicament again, he
would have used the same means of escape. But to apply a bit of
knowledge gained in one predicament to another difficulty was something
he had not yet done.</p>
<p>A dog may be taught that by pulling on the latchstring of a door he may
open it, but the same dog coming to a high and close-barred gate with a
latchstring attached, will never think of pulling on this second
latchstring. He associates a latchstring with the opening of the door.
The opening of a gate is another matter entirely.</p>
<p>Burl had been stirred to one invention by imminent peril. That is not
extraordinary. But to reason in cold blood, as he presently did, that
oil on his feet would nullify the glue upon his feet and enable him
again to walk in comfort—that was a triumph. The inventions of savages
are essentially matters of life and death, of food and safety. Comfort
and luxury are only produced by intelligence of a high order.</p>
<p>Burl, in safety, had added to his comfort. That was truly a more
important thing in his development than almost any other thing he could
have done. He oiled his feet.</p>
<p>It was an almost infinitesimal problem, but Burl's struggles with the
mental process of reasoning were actual. Thirty thousand years before
him, a wise man had pointed out that education is simply training in
thought, in efficient and effective thinking. Burl's tribe had been too
much preoccupied with food and mere existence to think, and now Burl,
sitting at the base of a squat toadstool that all but concealed him,
reexemplified Rodin's "Thinker" for the first time in many generations.</p>
<p>For Burl to reason that oil upon the soles of his feet would guard him
against sharp stones was as much a triumph of intellect as any
masterpiece of art in the ages before him. Burl was learning how to
think.</p>
<p>He stood up, walked, and crowed in sheer delight, then paused a moment
in awe of his own intelligence. Thirty-five miles from his tribe, naked,
unarmed, utterly ignorant of fire, of wood, of any weapons save a spear
he had experimented with the day before, abysmally uninformed concerning
the very existence of any art or science, Burl stopped to assure himself
that he was very wonderful.</p>
<p>Pride came to him. He wished to display himself to Saya, these things
upon his feet, and his spear. But his spear was gone.</p>
<hr style="width: 45%;" />
<p>With touching faith in the efficacy of this new pastime, Burl sat
promptly down again and knitted his brows. Just as a superstitious
person, once convinced that by appeal to a favorite talisman he will be
guided aright, will inevitably apply to that talisman on all occasions,
so Burl plumped himself down to think.</p>
<p>These questions were easily answered. Burl was naked. He would search
out garments for himself. He was weaponless. He would find himself a
spear. He was hungry—and would seek food, and he was far from his
tribe, so he would go to them. Puerile reasoning, of course, but
valuable, because it was consciously reasoning, consciously appealing to
his mind for guidance in difficulty, deliberate progress from a mental
desire to a mental resolution.</p>
<p>Even in the high civilization of ages before, few men had really used
their brains. The great majority of people had depended upon machines
and their leaders to think for them. Burl's tribefolk depended on their
stomachs. Burl, however, was gradually developing the habit of thinking
which makes for leadership and which would be invaluable to his little
tribe.</p>
<p>He stood up again and faced upstream, moving slowly and cautiously, his
eyes searching the ground before him keenly and his ears alert for the
slightest sound of danger. Gigantic butterflies, riotous in coloring,
fluttered overhead through the misty haze. Sometimes a grasshopper
hurtled through the air like a projectile, its transparent wings beating
the air frantically. Now and then a wasp sped by, intent upon its
hunting, or a bee droned heavily along, anxious and worried, striving in
a nearly flowerless world to gather the pollen that would feed the hive.</p>
<p>Here and there Burl saw flies of various sorts, some no larger than his
thumb, but others the size of his whole hand. They fed upon the juices
that dripped from the maggot-infested mushrooms, when filth more to
their liking was not at hand.</p>
<p>Very far away a shrill roaring sounded faintly. It was like a multitude
of clickings blended into a single sound, but was so far away that it
did not impress itself upon Burl's attention. He had all the strictly
localized vision of a child. What was near was important, and what was
distant could be ignored. Only the imminent required attention, and Burl
was preoccupied.</p>
<p>Had he listened, he would have realized that army ants were abroad in
countless millions, spreading themselves out in a broad array and eating
all they came upon far more destructively than so many locusts.</p>
<p>Locusts in past ages had eaten all green things. There were only giant
cabbages and a few such tenacious rank growths in the world that Burl
knew. The locusts had vanished with civilization and knowledge and the
greater part of mankind, but the army ants remained as an invincible
enemy to men and insects, and the most of the fungus growths that
covered the earth.</p>
<p>Burl did not notice the sound, however. He moved forward, briskly though
cautiously, searching with his eyes for garments, food, and weapons. He
confidently expected to find all of them within a short distance.</p>
<p>Surely enough he found a thicket—if one might call it so—of edible
fungi no more than half a mile beyond the spot where he had improvised
his sandals to protect the soles of his feet.</p>
<p>Without especial elation, Burl tugged at the largest until he had broken
off a food supply for several days. He went on, eating as he did so,
past a broad plain a mile and more across, being broken into odd little
hillocks by gradually ripening and suddenly developing mushrooms with
which he was unfamiliar.</p>
<p>The earth seemed to be in process of being pushed aside by rounded
protuberances of which only the tips showed. Blood-red hemispheres
seemed to be forcing aside the earth so they might reach the outer air.</p>
<p>Burl looked at them curiously, and passed among them without touching
them. They were strange, and to him most strange things meant danger. In
any event, he was full of a new purpose now. He wished garments and
weapons.</p>
<p>Above the plain a wasp hovered, a heavy object dangling beneath its
black belly, ornamented by a single red band. It was a wasp—the hairy
sand-wasp—and it was bringing a paralyzed gray caterpillar to its
burrow.</p>
<p>Burl watched it drop down with the speed and sureness of an arrow, pull
aside a heavy, flat stone, and descend into the ground. It had a
vertical shaft dug down for forty feet or more.</p>
<p>It descended, evidently inspected the interior, reappeared, and vanished
into the hole again, dragging the gray worm after it. Burl, marching on
over the broad plain that seemed stricken with some erupting disease
from the number of red pimples making their appearance, did not know
what passed below, but observed the wasp emerge again and busily scratch
dirt and stones into the shaft until it was full.</p>
<p>The wasp had paralyzed a caterpillar, taken it to the already prepared
burrow, laid an egg upon it, and rilled up the entrance. In course of
time the egg would hatch into a grub barely as long as Burl's
forefinger, which would then feed upon the torpid caterpillar until it
had waxed large and fat. Then it would weave itself a chrysalis and
sleep a long sleep, only to wake as a wasp and dig its way to the open
air.</p>
<p>Burl reached the farther side of the plain and found himself threading
the aisles of one of the fungus forests in which the growths were
hideous, misshapen travesties upon the trees they had supplanted.
Bloated, yellow limbs branched off from rounded, swollen trunks. Here
and there a pear-shaped puff-ball, Burl's height and half as much again,
waited craftily until a chance touch should cause it to shoot upward a
curling puff of infinitely fine dust.</p>
<p>Burl went cautiously. There were dangers here, but he moved forward
steadily, none the less. A great mass of edible mushroom was slung under
one of his arms, and from time to time he broke off a fragment and ate
of it, while his large eyes searched this way and that for threats of
harm.</p>
<p>Behind him, a high, shrill roaring had grown slightly in volume and
nearness, but was still too far away to impress Burl. The army ants were
working havoc in the distance. By thousands and millions, myriads upon
myriads, they were foraging the country, clambering upon every eminence,
descending into every depression, their antennae waving restlessly and
their mandibles forever threateningly extended. The ground was black
with them, each was ten inches and more in length.</p>
<p>A single such creature would be formidable to an unarmed and naked man
like Burl, whose wisest move would be flight, but in their thousands and
millions they presented a menace from which no escape seemed possible.
They were advancing steadily and rapidly, shrill stridulations and a
multitude of clickings marking their movements.</p>
<p>The great helpless caterpillars upon the giant cabbages heard the sound
of their coming, but were too stupid to flee. The black multitudes
covered the rank vegetables, and tiny but voracious jaws began to tear
at the flaccid masses of flesh.</p>
<p>Each creature had some futile means of struggling. The caterpillars
strove to throw off their innumerable assailants by writhings and
contortions, wholly ineffective. The bees fought their entrance to the
gigantic hives with stings and wingbeats. The moths took to the air in
helpless blindness when discovered by the relentless throngs of small
black insects which reeked of formic acid and left the ground behind
them denuded in every living thing.</p>
<p>Before the oncoming horde was a world of teeming life, where mushrooms
and fungi fought with thinning numbers of giant cabbages for foothold.
Behind the black multitude was—nothing. Mushrooms, cabbages, bees,
wasps, crickets. Every creeping and crawling thing that did not get
aloft before the black tide reached it was lost, torn to bits by tiny
mandibles. Even the hunting spiders and tarantulas fell before the host
of insects, having killed many in their final struggles, but overwhelmed
by sheer numbers. And the wounded and dying army ants made food for
their sound comrades.</p>
<p>There is no mercy among insects. Only the web-spiders sat unmoved and
immovable in their colossal snares, secure in the knowledge that their
gummy webs would discourage attempts at invasion along the slender
supporting cables.</p>
<p>Surging onward, flowing like a monstrous, murky tide over the yellow,
steaming earth, the army ants advanced. Their vanguard reached the
river, and recoiled. Burl was perhaps five miles distant when they
changed their course, communicating the altered line of march to those
behind them in some mysterious fashion of transmitting intelligence.</p>
<p>Thirty thousand years before, scientists had debated gravely over the
means of communication among ants. They had observed that a single ant
finding a bit of booty too large for him to handle alone would return to
the ant-city and return with others. From that one instance they deduced
a language of gestures made with the antennae.</p>
<p>Burl had no wise theories. He merely knew facts, but he knew that the
ants had some form of speech or transmission of ideas. Now, however, he
was moving cautiously along toward the stamping grounds of his tribe, in
complete ignorance of the black blanket of living creatures creeping
over the ground toward him.</p>
<p>A million tragedies marked the progress of the insect army. There was a
tiny colony of mining bees—Zebra bees—a single mother, some four feet
long, had dug a huge gallery with some ten cells, in which she laid her
eggs and fed her grubs with hard-gathered pollen. The grubs had waxed
fat and large, became bees, and laid eggs in their turn, within the
gallery their mother had dug out for them.</p>
<p>Ten such bulky insects now foraged busily for grubs within the ancestral
home, while the founder of the colony had grown draggled and wingless
with the passing of time. Unable to forage herself, the old bee became
the guardian of the nest or hive, as is the custom among the mining
bees. She closed the opening of the hive with her head, making a living
barrier within the entrance, and withdrawing to give entrance and exit
only to duly authenticated members of the extensive colony.</p>
<p>The ancient and draggled concierge of the underground dwelling was at
her post when the wave of army ants swept over her. Tiny, evil-smelling
feet trampled upon her. She emerged to fight with mandible and sting for
the sanctity of the hive. In a moment she was a shaggy mass of biting
ants, rending and tearing at her chitinous armour. The old bee fought
madly, viciously, sounding a buzzing alarm to the colonists yet within
the hive. They emerged, fighting as they came, for the gallery leading
down was a dark flood of small insects.</p>
<hr style="width: 45%;" />
<p>For a few moments a battle such as would make an epic was in progress.
Ten huge bees, each four to five feet long, fighting with legs and jaw,
wing and mandible, with all the ferocity of as many tigers. The tiny,
vicious ants covered them, snapping at their multiple eyes, biting at
the tender joints in their armour—sometimes releasing the larger prey
to leap upon an injured comrade wounded by the huge creature they
battled in common.</p>
<p>The fight, however, could have but one ending. Struggle as the bees
might, herculean as their efforts might be, they were powerless against
the incredible numbers of their assailants, who tore them into tiny
fragments and devoured them. Before the last shred of the hive's
defenders had vanished, the hive itself was gutted alike of the grubs it
had contained and the food brought to the grubs by such weary effort of
the mature bees.</p>
<p>The army ants went on. Only an empty gallery remained, that and a few
fragments of tough armour, unappetizing even to the omniverous ants.</p>
<p>Burl was meditatively inspecting the scene of a recent tragedy, where
rent and scraped fragments of a great beetle's shiny casing lay upon the
ground. A greater beetle had come upon the first and slain him. Burl was
looking upon the remains of the meal.</p>
<p>Three or four minims, little ants barely six inches long, foraged
industriously among the bits. A new ant city was to be formed and the
queen-ant lay hidden a half-mile away. These were the first hatchlings,
who would feed the larger ants on whom would fall the great work of the
ant-city. Burl ignored them, searching with his eyes for a spear or
weapon.</p>
<p>Behind him the clicking roar, the high-pitched stridulations of the
horde of army ants, rose in volume. Burl turned disgustedly away. The
best he could find in the way of a weapon was a fiercely toothed hind
leg. He picked it up, and an angry whine rose from the ground.</p>
<p>One of the black minims was working busily to detach a fragment of flesh
from the joint of the leg, and Burl had snatched the morsel from him.
The little creature was hardly half a foot in length, but it advanced
upon Burl, shrilling angrily. He struck it with the leg and crushed it.
Two of the other minims appeared, attracted by the noise the first had
made. Discovering the crushed body of their fellow, they unceremoniously
dismembered it and bore it away in triumph.</p>
<p>Burl went on, swinging the toothed limb in his hand. It made a fair
club, and Burl was accustomed to use stones to crush the juicy legs of
such giant crickets as his tribe sometimes came upon. He formed a
half-defined idea of a club. The sharp teeth of the thing in his hand
made him realize that a sidewise blow was better than a spearlike
thrust.</p>
<p>The sound behind him had become a distant whispering, high-pitched, and
growing nearer. The army ants swept over a mushroom forest, and the
yellow, umbrella-like growths swarmed with black creatures devouring the
substance on which they found a foothold.</p>
<p>A great bluebottle fly, shining with a metallic luster, reposed in an
ecstasy of feasting, sipping through its long proboscis the dark-colored
liquid that dripped slowly from a mushroom. Maggots filled the mushroom,
and exuded a solvent pepsin that liquefied the white firm "meat."</p>
<p>They fed upon this soup, this gruel, and a surplus dripped to the ground
below, where the bluebottle drank eagerly. Burl drew near, and struck.
The fly collapsed into a writhing heap. Burl stood over it for an
instant, pondering.</p>
<p>The army ants came nearer, down into a tiny valley, swarming into and
through a little brook over which Burl had leaped. Ants can remain under
water for a long time without drowning, so the small stream was but a
minor obstacle, though the current of water swept many of them off their
feet until they choked the brook-bed, and their comrades passed over
their struggling bodies dry-shod. They were no more than temporarily
annoyed, however, and presently crawled out to resume their march.</p>
<p>About a quarter of a mile to the left of Burl's line of march, and
perhaps a mile behind the spot where he stood over the dead bluebottle
fly, there was a stretch of an acre or more where the giant, rank
cabbages had so far resisted the encroachments of the ever present
mushrooms. The pale, cross-shaped flowers of the cabbages formed food
for many bees, and the leaves fed numberless grubs and worms, and
loud-voiced crickets which crouched about on the ground, munching busily
at the succulent green stuff. The army ants swept into the green area,
ceaselessly devouring all they came upon.</p>
<p>A terrific din arose. The crickets hurtled away in a rocketlike flight,
in a dark cloud of wildly beating wings. They shot aimlessly in any
direction, with the result that half, or more than half, fell in the
midst of the black tide of devouring insects and were seized as they
fell. They uttered terrible cries as they were being torn to bits.
Horrible inhuman screams reached Burl's ears.</p>
<p>A single such cry of agony would not have attracted Burl's attention—he
lived in the very atmosphere of tragedy—but the chorus of creatures in
torment made him look up. This was no minor horror. Wholesale slaughter
was going on. He peered anxiously in the direction of the sound.</p>
<p>A wild stretch of sickly yellow fungus, here and there interspersed with
a squat toadstool or a splash of vivid color where one of the many
"rusts" had found a foothold. To the left a group of awkward, misshapen
fungoids clustered in silent mockery of a forest of trees. There a mass
of faded green, where the giant cabbages stood.</p>
<p>With the true sun never shining upon them save through a blanket of
thick haze or heavy clouds, they were pallid things, but they were the
only green things Burl had seen. Their nodding white flowers with four
petals in the form of a cross glowed against the yellowish green leaves.
But as Burl gazed toward them, the green became slowly black.</p>
<p>From where he stood, Burl could see two or three great grubs in lazy
contentment, eating ceaselessly on the cabbages on which they rested.
Suddenly first one and then the other began to jerk spasmodically. Burl
saw that about each of them a tiny rim of black had clustered. Tiny
black motes milled over the green surfaces of the cabbages. The grubs
became black, the cabbages became black. Horrible contortions of the
writhing grubs told of the agonies they were enduring. Then a black wave
appeared at the further edge of the stretch of the sickly yellow fungus,
a glistening, living wave, that moved forward rapidly with the roar of
clickings and a persistent overtone of shrill stridulations.</p>
<p>The hair rose upon Burl's head. He knew what this was! He knew all too
well the meaning of that tide of shining bodies. With a gasp of terror,
all his intellectual preoccupations forgotten, he turned and fled in
ultimate panic. And the tide came slowly on after him.</p>
<hr style="width: 45%;" />
<p>He flung away the great mass of edible mushroom, but clung to his
sharp-toothed club desperately, and darted through the tangled aisles of
the little mushroom forest with a heedless disregard of the dangers that
might await him there. Flies buzzed about him loudly, huge creatures,
glittering with a metallic luster. Once he was struck upon the shoulder
by the body of one of them, and his skin was torn by the swiftly
vibrating wings of the insect, as long as Burl's hand.</p>
<p>Burl thrust it away and sped on. The oil with which he was partly
covered had turned rancid, now, and the odor attracted them,
connoisseurs of the fetid. They buzzed over his head, keeping pace even
with his headlong flight.</p>
<p>A heavy weight settled upon his head, and in a moment was doubled. Two
of the creatures had dropped upon his oily hair, to sip the rancid oil
through their disgusting proboscises. Burl shook them off with his hand
and ran madly on. His ears were keenly attuned to the sound of the army
ants behind him, and it grew but little farther away.</p>
<p>The clicking roar continued, but began to be overshadowed by the buzzing
of the flies. In Burl's time the flies had no great heaps of putrid
matter in which to lay their eggs. The ants—busy scavengers—carted
away the debris of the multitudinous tragedies of the insect world long
before it could acquire the gamey flavor beloved by the fly maggots.
Only in isolated spots were the flies really numerous, but there they
clustered in clouds that darkened the sky.</p>
<p>Such a buzzing, whirling cloud surrounded the madly running figure of
Burl. It seemed as though a miniature whirlwind kept pace with the
little pink-skinned man, a whirlwind composed of winged bodies and
multi-faceted eyes. He twirled his club before him, and almost every
stroke was interrupted by an impact against a thinly armoured body which
collapsed with a spurting of reddish liquid.</p>
<p>An agonizing pain as of a red-hot iron struck upon Burl's back. One of
the stinging flies had thrust its sharp-tipped proboscis into Burl's
flesh to suck the blood.</p>
<p>Burl uttered a cry and—ran full tilt into the thick stalk of a
blackened and draggled toadstool. There was a curious crackling as of
wet punk or brittle rotten wood. The toadstool collapsed upon itself
with a strange splashing sound. Many flies had laid their eggs in the
fungoid, and it was a teeming mass of corruption and ill-smelling
liquid.</p>
<p>With the crash of the toadstool's "head" upon the ground, it fell into a
dozen pieces, and the earth for yards around was spattered with a
stinking liquid in which tiny, headless maggots twitched convulsively.</p>
<p>The buzzing of the flies took on a note of satisfaction, and they
settled by hundreds about the edges of the ill-smelling pools, becoming
lost in the ecstacy of feasting while Burl staggered to his feet and
darted off again. This time he was but a minor attraction to the flies,
and but one or two came near him. From every direction they were
hurrying to the toadstool feast, to the banquet of horrible, liquefied
fungus that lay spread upon the ground.</p>
<p>Burl ran on. He passed beneath the wide-spreading leaves of a giant
cabbage. A great grasshopper crouched upon the ground, its tremendous
jaws crunching the rank vegetation voraciously. Half a dozen great worms
ate steadily from their resting-places among the leaves. One of them had
slung itself beneath an overhanging leaf—which would have thatched a
dozen homes for as many men—and was placidly anchoring itself in
preparation for the spinning of a cocoon in which to sleep the sleep of
metamorphosis.</p>
<p>A mile away, the great black tide of army ants was advancing
relentlessly. The great cabbage, the huge grasshopper, and all the
stupid caterpillars upon the wide leaves would soon be covered with the
tiny biting insects. The cabbage would be reduced to a chewed and
destroyed stump, the colossal, furry grubs would be torn into a myriad
mouthfuls and devoured by the black army ants, and the grasshopper would
strike out with terrific, unguided strength, crushing its assailants by
blows of its powerful hind legs and bites of its great jaws. But it
would die, making terrible sounds of torment as the vicious mandibles of
the army ants found crevices in its armour.</p>
<p>The clicking roar of the ants' advance overshadowed all other sounds,
now. Burl was running madly, breath coming in great gasps, his eyes wide
with panic. Alone of all the world about him, he knew the danger behind.
The insects he passed were going about their business with that
terrifying efficiency found only in the insect world.</p>
<hr style="width: 45%;" />
<p>There is something strangely daunting in the actions of an insect. It
moves so directly, with such uncanny precision, with such utter
indifference to anything but the end in view. Cannibalism is a rule,
almost without exception. The paralysis of prey, so it may remain alive
and fresh—though in agony—for weeks on end, is a common practice. The
eating piecemeal of still living victims is a matter of course.</p>
<p>Absolute mercilessness, utter callousness, incredible inhumanity beyond
anything known in the animal world is the natural and commonplace
practice of the insects. And these vast cruelties are performed by
armoured, machine-like creatures with an abstraction and a routine air
that suggests a horrible Nature behind them all.</p>
<p>Burl nearly stumbled upon a tragedy. He passed within a dozen yards of a
space where a female dung-beetle was devouring the mate whose honeymoon
had begun that same day and ended in that gruesome fashion. Hidden
behind a clump of mushrooms, a great yellow-banded spider was coyly
threatening a smaller male of her own species. He was discreetly ardent,
but if he won the favor of the gruesome creature he was wooing, he would
furnish an appetizing meal for her some time within twenty-four hours.</p>
<p>Burl's heart was pounding madly. The breath whistled in his
nostrils—and behind him, the wave of army ants was drawing nearer. They
came upon the feasting flies. Some took to the air and escaped, but
others were too engrossed in their delicious meal. The twitching little
maggots, stranded upon the earth by the scattering of their soupy broth,
were torn in pieces. The flies who were seized vanished into tiny maws.
The serried ranks of black insects went on.</p>
<p>The tiny clickings of their limbs, the perpetual challenges and
cross-challenges of crossed antennae, the stridulations of the
creatures, all combined to make a high-pitched but deafening din. Now
and then another sound pierced the noises made by the ants themselves. A
cricket, seized by a thousand tiny jaws, uttered cries of agony. The
shrill note of the crickets had grown deeply bass with the increase in
size of the organs that uttered it.</p>
<p>There was a strange contrast between the ground before the advancing
horde and that immediately behind it. Before, a busy world, teeming with
life. Butterflies floating overhead on lazy wings, grubs waxing fat and
huge upon the giant cabbages, crickets eating, great spiders sitting
quietly in their lairs waiting with invincible patience for prey to draw
near their trap doors or fall into their webs, colossal beetles
lumbering heavily through the mushroom forests, seeking food, making
love in monstrous, tragic fashion.</p>
<p>And behind the wide belt of army ants—chaos. The edible mushrooms gone.
The giant cabbages left as mere stumps of unappetizing pulp, the busy
life of the insect world completely wiped out save for the flying
creatures that fluttered helplessly over an utterly changed landscape.
Here and there little bands of stragglers moved busily over the denuded
earth, searching for some fragment of food that might conceivably have
been overlooked by the main body.</p>
<p>Burl was putting forth his last ounce of strength. His limbs trembled,
his breathing was agony, sweat stood out upon his forehead. He ran a
little, naked man with the disjointed fragment of a huge insect's limb
in his hand, running for his insignificant life, running as if his
continued existence among the million tragedies of that single day were
the purpose for which the whole of the universe had been created.</p>
<p>He sped across an open space a hundred yards across. A thicket of
beautifully golden mushrooms (<i>Agaricus caesareus</i>) barred his way.
Beyond the mushrooms a range of strangely colored hills began, purple
and green and black and gold, melting into each other, branching off
from each other, inextricably tangled.</p>
<p>They rose to a height of perhaps sixty or seventy feet, and above them a
little grayish haze had gathered. There seemed to be a layer of tenuous
vapor upon their surfaces, which slowly rose and coiled, and gathered
into a tiny cloudlet above their tips.</p>
<p>The hills, themselves, were but masses of fungus, mushrooms and fungoids
of every description, yeasts, "musts," and every form of fungus growth
which had grown within itself and about itself until this great mass of
strangely colored, spongy stuff had gathered in a mass that undulated
unevenly across the level earth for miles.</p>
<p>Burl burst through the golden thicket and attacked the ascent. His feet
sank into the spongy sides of the hillock. Panting, gasping, staggering
from exhaustion, he made his way up the top. He plunged into a little
valley on the farther side, up another slope. For perhaps ten minutes he
forced himself on, then collapsed. He lay, unable to move further, in a
little hollow, his sharp-toothed club still clasped in his hands. Above
him, a bright yellow butterfly with a thirty-foot spread of wing,
fluttered lightly.</p>
<p>He lay motionless, breathing in great gasps, his limbs stubbornly
refusing to lift him.</p>
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<p>The sound of the army ants continued to grow near. At last, above the
crest of the last hillock he had surmounted, two tiny antennae appeared,
then the black glistening head of an army ant, the forerunner of its
horde. It moved deliberately forward, waving its antennae ceaselessly.
It made its way toward Burl, tiny clickings coming from the movements of
its limbs.</p>
<p>A little wisp of tenuous vapor swirled toward the ant, a wisp of the
same vapor that had gathered above the whole range of hills as a thin,
low cloud. It enveloped the insect—and the ant seemed to be attacked by
a strange convulsion. Its legs moved aimlessly. It threw itself
desperately about. If it had been an animal, Burl would have watched
with wondering eyes while it coughed and gasped, but it was an insect
breathing through air-holes in its abdomen. It writhed upon the spongy
fungus growth across which it had been moving.</p>
<p>Burl, lying in an exhausted, panting heap upon the purple mass of
fungus, was conscious of a strange sensation. His body felt strangely
warm. He knew nothing of fire or the heat of the sun, and the only
sensation of warmth he had ever known was that caused when the members
of his tribe had huddled together in their hiding place when the damp
chill of the night had touched their soft-skinned bodies. Then the heat
of their breaths and their bodies had kept out the chill.</p>
<p>This heat that Burl now felt was a hotter, fiercer heat. He moved his
body with a tremendous effort, and for a moment the fungus was cool and
soft beneath him. Then, slowly, the sensation of heat began again, and
increased until Burl's skin was red and inflamed from the irritation.</p>
<p>The thin and tenuous vapor, too, made Burl's lungs smart and his eyes
water. He was breathing in great, choking gasps, but the period of
rest—short as it was—had enabled him to rise and stagger on. He
crawled painfully to the top of the slope, and looked back.</p>
<p>The hill-crest on which he stood was higher than any of those he had
passed in his painful run, and he could see clearly the whole of the
purple range. Where he was, he was near the farther edge of the range,
which was here perhaps half a mile wide.</p>
<p>It was a ceaseless, undulating mass of hills and hollows, ridges and
spurs, all of them colored, purple and brown and golden-yellow, deepest
black and dingy white. And from the tips of most of the pointed hills
little wisps of vapor rose up.</p>
<p>A thin, dark cloud had gathered overhead. Burl could look to the right
and left, and see the hills fading into the distance, growing fainter as
the haze above them seemed to grow thicker. He saw, too, the advancing
cohorts of the army ants, creeping over the tangled mass of fungus
growth. They seemed to be feeding as they went, upon the fungus that had
gathered into these incredible monstrosities.</p>
<p>The hills were living. They were not upheavals of the ground, they were
festering heaps of insanely growing, festering mushrooms and fungus.
Upon most of them a purple mould had spread itself so that they seemed a
range of purple hills, but here and there patches of other vivid colors
showed, and there was a large hill whose whole side was a brilliant
golden hue. Another had tiny bright red spots of a strange and malignant
mushroom whose properties Burl did not know, scattered all over the
purple with which it was covered.</p>
<p>Burl leaned heavily upon his club and watched dully. He could run no
more. The army ants were spreading everywhere over the mass of fungus.
They would reach him soon.</p>
<p>Far to the right the vapor thickened. A column of smoke arose. What Burl
did not know and would never know was that far down in the interior of
that compressed mass of fungus, slow oxidization had been going on. The
temperature of the interior had been raised. In the darkness and the
dampness deep down in the hills, spontaneous combustion had begun.</p>
<p>Just as the vast piles of coal the railroad companies of thirty thousand
years before had gathered together sometimes began to burn fiercely in
their interiors, and just as the farmers' piles of damp straw suddenly
burst into fierce flames from no cause, so these huge piles of
tinder-like mushrooms had been burning slowly within themselves.</p>
<p>There had been no flames, because the surface remained intact and nearly
air-tight. But when the army ants began to tear at the edible surfaces
despite the heat they encountered, fresh air found its way to the
smouldering masses of fungus. The slow combustion became rapid
combustion. The dull heat became fierce flames. The slow trickle of thin
smoke became a huge column of thick, choking, acrid stuff that set the
army ants that breathed it into spasms of convulsive writhing.</p>
<p>From a dozen points the flames burst out. A dozen or more columns of
blinding smoke rose to the heavens. A pall of fume-laden smoke gathered
above the range of purple hills, while Burl watched apathetically. And
the serried ranks of army ants marched on to the widening furnaces that
awaited them.</p>
<p>They had recoiled from the river, because their instinct had warned
them. Thirty thousand years without danger from fire, however, had let
their racial fear of fire die out. They marched into the blazing
orifices they had opened in the hills, snapping with their mandibles at
the leaping flames, springing at the glowing tinder.</p>
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