<h2 class="nobreak" id="CHAPTER_XV">CHAPTER XV.<br/> <span class="cheaderfont">PROFESSOR KARL GRAFF.</span></h2></div>
<p>Patsy Garvan’s disappointment was as deep and bitter
as one could imagine. He scarce could contain it,
in fact, and his first impulse was to bolt from his concealment
and demand of the chauffeur where he had
left Doctor David Devoll.</p>
<p>Brief reflection, however, convinced Patsy that that
would be a fatal mistake, that the chauffeur might be
in league with the physician, after all, and that this
stranger who had unexpectedly alighted from the
motor car might also be one of Doctor Devoll’s confederates,
sent by him to his road house on a mission
which he had thought it indiscreet to personally
undertake.</p>
<p>“I’ll hold my horses,” thought Patsy, with hopes
reviving. “There may be something doing, after all,
that will set me right. I’ll wait and see. He seems to
be giving that driver important instructions.”</p>
<p>The two men had been talking quietly in the driveway,
too low for Patsy to hear so much as a single
word, but the elderly man now turned abruptly up
the steps and peered into the hall for a moment, and
then entered the house.</p>
<p>The chauffeur closed the door of the car, then turned
and shot a searching glance in each direction, causing
Patsy to crouch lower in his concealment.</p>
<p>Presently, approaching the corner, the driver gazed
toward the rear of the house, then started abruptly<span class="pagenum">[131]</span>
and walked completely around it, returning to the
same corner and taking a position from which he could
continue to watch the side windows, also the driveway
leading to the stable yard, on that side of the
house nearest to Patsy.</p>
<p>It was a situation that now precluded any move
on Patsy’s part. To approach any of the windows,
or even to steal away and seek an advantage elsewhere,
was out of the question. Detection would be inevitable.
He had no alternative but to lie low.</p>
<p>Minutes passed, and the chauffeur continued to wait
and watch, scarcely stirring from his position—all of
which convinced Patsy that his suspicions were correct,
that the elderly man was holding a conference
with some one and that the chauffeur was guarding
against spies outside.</p>
<p>That he was right appeared in what occurred when
the elderly man entered the house. He met no one
in the hall, save an aged black cat, and he quickly entered
a side room, in which a solitary man was waiting
with an empty whisky glass on the table near which
he was seated.</p>
<p>He was a tall man, close upon forty, very well clad,
having dark eyes and complexion, but a rather weak
cast of features. He was smooth-shaven. A combination
false mustache and beard had been removed and
was lying on the table. He looked up when the
other entered, saying a bit irritably:</p>
<p>“Well, you’re here, Graff, at last. What kept you?
I’ve been waiting half an hour.”</p>
<p>“But not idle!”</p>
<p>Graff spoke with a fiery gleam leaping up in his
eyes. He was the same Professor Graff, chemist, with<span class="pagenum">[132]</span>
an office and a laboratory in the Waldmere Chambers,
who had appeared in the corridor soon after the corpse
of Gaston Todd was found, and who had blandly asserted,
when questioned by Nick Carter, that he was
not a physician and that his opinion regarding the fatality
would be worthless.</p>
<p>There was no blandness in his low voice just then,
however, nor any such quality.</p>
<p>“But not idle!” he repeated, with a fierce, sibilant
hiss, pointing to the whisky glass and then dashing
it to atoms in the fireplace. “You cut that out, Dorson,
while doing business with me. Booze is a damned
bad partner. It has brought you where you are and
made you my tool. Cut it out—entirely! Obey me,
Dorson, or—God help you!”</p>
<p>A resentful scowl appeared on Dorson’s face, which
was not without signs of past dissipation, but the
frown vanished quickly under the fiery rebuke of his
companion. He pulled himself up, nevertheless, and
said sullenly:</p>
<p>“I’m not so sure, Graff, that I’ll consent to be your
tool.”</p>
<p>“Not consent?” Professor Graff sneered icily.
“What are you saying? You have consented.”</p>
<p>“I can revoke——”</p>
<p>“Not with me!”</p>
<p>“Oh, I don’t know. I’m not so sure.”</p>
<p>“I am.” Graff’s voice was cold, but his eyes were
like balls of fire. “There will be no revocation. You
will not withdraw from our compact.”</p>
<p>“What’s to prevent me?”</p>
<p>“Fear. If not fear—this.”</p>
<p>Professor Graff thrust his hand into his pocket and<span class="pagenum">[133]</span>
drew a singular weapon. It resembled an automatic
revolver, with a cylinderlike device attached to the
barrel. There was no trigger, however, but only a
small, round button, on which the finger of the chemist
lightly rested. He displayed the weapon in his
hand, his lips parting with a mocking smile, while
Dorson started slightly and gazed at it incredulously.</p>
<p>“This will, if necessary, be our arbiter,” Graff
sneered. “I can end you with it in the hundredth
part of a second.”</p>
<p>“You would not dare,” gasped Dorson. “You would
bring Leary and the bartender. You would be caught
red-handed.”</p>
<p>“There would be no red hand, no bloodshed, no
sound,” Graff retorted. “It makes no noise, discharges
no bullet. But the effect is no less deadly. I
could leave you here as if you had fallen lifeless from
your chair, or as if—perdition! Are you still doubtful?
You shall see.”</p>
<p>There was something even more terrible in the aspect
of this man at that moment than in his threatening
words. He swung around quickly and quietly
opened the door. The black cat he had seen in the
hall still was there. He stepped out and seized the
animal, then returned and tossed him to a corner of the
room, closing the door.</p>
<p>The black cat was gazing with dilated yellow eyes
at the lowering chemist, as if surprised at such extraordinary
treatment.</p>
<p>“Watch!” Graff snapped fiercely, with one swift
glance at his horrified companion.</p>
<p>He extended his right hand and the strange weapon.
His piercing gaze leaped over the glistening barrel.<span class="pagenum">[134]</span>
His finger pressed the round button in the cylinder.
There was a quick, explosive puff, yet hardly audible,
but the black cat dropped in a crumpled heap, with his
yellow eyes gone dim and glassy. The animal was
dead, as crimp and shriveled as if the hot breath of a
withering blight had passed over him.</p>
<p>Dorson caught his breath convulsively and tried
to speak, but his voice seemed to die in his throat.</p>
<p>Professor Graff kicked the lifeless cat farther into
the corner, then sat down directly opposite his ghastly
companion, as unconcerned as if nothing had transpired.
He replaced the mysterious weapon in his
pocket, saying coldly, yet pointedly:</p>
<p>“It is a very handy thing to have when circumstances
make it necessary.”</p>
<p>“It is devilish!” Dorson found his voice, shuddering,
and wiped the sweat from his brow. “It is fiendish!”</p>
<p>“But convincing?” queried Graff, with searching
scrutiny.</p>
<p>“Convincing—yes!” Dorson shuddered again.
“Enough has been done and said, but I wish I never
had seen you, never conspired with you.”</p>
<p>“But, having done so, there can be no revocation,
no retreat,” Graff said sternly. “I have seen signs of
it, Dorson, and I have to convince you.”</p>
<p>“Enough has been done and said,” Dorson repeated,
pulling himself together.</p>
<p>“Besides, there are other reasons,” Graff added.
“We are up against a tough proposition, one that is
hourly becoming more threatening; but of that a little
later. We’ll get right down to business.”</p>
<p>“The windows——”</p>
<p><span class="pagenum">[135]</span></p>
<p>“Fear nothing. Toby Monk is watching them.”</p>
<p>“The door——”</p>
<p>“None can approach it unheard. I have the ears of
a rat.”</p>
<p>“Be quick, then,” said Dorson more calmly. “The
sooner we leave here, Graff, the better.”</p>
<p>“Your identity has not been discovered?” questioned
the chemist quickly.</p>
<p>“No, no, nothing of that kind. It is not even suspected.”</p>
<p>“Nor will I be seen,” Graff said confidently. “I’ll
make sure of that, and have guarded against other
contingencies. Toby is disguised. His car bears a
false number. None will learn of our rendezvous, nor
even suspect it. Now, Dorson, have you brought the
invitations?”</p>
<p>“Yes, two of them,” said Dorson, producing two
sealed envelopes and placing them on the table.</p>
<p>“Good!” Graff seized them and put them in his
pocket. “From whom did you get them?”</p>
<p>“I stole them from those with which my aunt, Mrs.
Thurlow, was supplied to dispose of,” replied Dorson.
“She is one of the sponsors for the affair, and that
was the only way to get them without disclosing the
names of the persons who are to use them. No one
will be admitted without a card bearing his name.
It’s an exclusive affair. Fictitious names can be inscribed
on these.”</p>
<p>“Capital!” Graff nodded, smiling maliciously.
“What if your aunt misses them?”</p>
<p>“She will think she mislaid them, and can easily
explain to the managers. Her word is good.”</p>
<p>“None better,” Graff dryly admitted.</p>
<p><span class="pagenum">[136]</span></p>
<p>“What more must be done?” Dorson questioned.</p>
<p>“Take my final instructions.” Professor Graff drew
nearer the table and fixed his penetrating eyes on
those of his confederate. “You are in the social
swim, Dorson, and can execute them without incurring
the slightest suspicion.”</p>
<p>“That was the agreement. You promised that no
harm should come to me.”</p>
<p>“None will. Remember, too, that I promised you
ten thousand dollars for your share of the plunder.
That will more than pay your debts and set you on
your feet. It’s not a bad reward, Dorson, for a mere
bit of safe and important work.”</p>
<p>“That’s the only inducement.” Dorson’s face was
haggard and clouded. “I’ll chuck everything, honor
and self-respect, in order to square myself. But what
is this safe and important work? What must I do?”</p>
<p>Professor Graff took from his pocket a small celluloid
box with a close-fitting cover. He caressed
it fondly for a moment, with an abnormal gleam and
glitter in his narrow eyes, then leaned forward and
said impulsively:</p>
<p>“Listen! You are to take this, but do not for your
life venture to open it before the fateful moment arrives.
The box is air-tight, but its cover can be easily
removed. It contains only a lady’s handkerchief.”</p>
<p>“What am I to do with it?” Dorson asked, gazing
curiously at the smooth white box.</p>
<p>“Take it to the reception,” Graff directed. “You
are familiar with the ballroom and its surroundings,
with the row of French windows that open upon the
west balcony roof near the porte-cochère.”</p>
<p><span class="pagenum">[137]</span></p>
<p>“Yes, yes, of course,” Dorson said impatiently. “I
know all that.”</p>
<p>“Note me, then,” Graff continued. “I will be at
the ball to give you a signal. We must not be seen
together, however, nor in any way betray that we are
acquainted.”</p>
<p>“Well?”</p>
<p>“Upon getting my signal, which you will receive
at an opportune moment when she is alone, you must
immediately join Mrs. Mortimer Thurlow, at the same
time stealthily opening the box and removing the
handkerchief.”</p>
<p>“And then?”</p>
<p>“Give it to her at once, without a moment’s delay,
and remark she dropped it,” said Graff. “She will
infer that it is her own. If not, she will at least raise
it toward her face to examine it. Step back a little,
meantime, covering your nostrils, that you may inhale
no appreciable quantity of that with which the handkerchief
is impregnated.”</p>
<p>“What’s the stuff?” growled Dorson, brows knitting.</p>
<p>“Do not be curious.” Professor Graff spoke with
a frown. “I have confederates, but to none do I confide
my secrets. Take my instructions—and obey
them.”</p>
<p>“Well, what more?”</p>
<p>“Watch the woman,” Graff continued. “Only her
eyes will change perceptibly. A fixed expression will
immediately appear, and her pupils will contract to
mere pin points. Take her arm, then, and lead her
out through the nearest French window.”</p>
<p>“Suppose she refuses to go, or——”</p>
<p><span class="pagenum">[138]</span></p>
<p>“She will not refuse or do anything else,” Graff interrupted.
“She will go willingly and without a word
or a subsequent recollection of what occurs. Place
her in the nearest chair on the balcony. Get the handkerchief
and return it to the box, then hasten to the
ballroom and go after a glass of water. You can
afterward assert that she sent you for it and said
she felt faint. She will admit it, for she will remember
nothing and cannot consistently deny it.”</p>
<p>“But the pearls?” Dorson questioned, eyes glowing.
“What of the rope of pearls?”</p>
<p>“There will be no rope of pearls.” Graff’s teeth
met with a vicious snap. “All that must be done can
be done in a single minute. When help comes, when
you return, when the woman revives, though all occurs
within a minute, there will be no rope of pearls. It
will have been stolen—mysteriously stolen.”</p>
<p>“But I may be suspected,” argued Dorson.</p>
<p>“Absurd! You could not possibly steal and dispose
of it under the seeming conditions. The woman
will believe she was faint only for a moment. She
will not be sure it was then that she lost the pearls.
She is your aunt, moreover, and would refuse to
suspect you.”</p>
<p>“But your infernal stuff may fail to work,” Dorson
suggested.</p>
<p>“It will not fail. It cannot fail.” Graff spoke with
convincing assurance. “I have tested it upon no less
than four subjects, Dorson, to make sure of success
in this undertaking. There is nothing for you to fear,
absolutely nothing.”</p>
<p>“I’ll tackle it, then, and take the chance.” Dorson<span class="pagenum">[139]</span>
abruptly declared, thrusting the celluloid box into his
pocket. “Is there anything more?”</p>
<p>Professor Graff hesitated for a moment, then shook
his head.</p>
<p>“No, nothing for us to discuss,” he replied.</p>
<p>“But you mentioned a tough proposition that you
would speak of presently. What did you mean by
that?” Dorson demanded suspiciously.</p>
<p>“Only that an unexpected force is at work against
us, one that many would fear, and with which few
could successfully cope.” Graff’s voice took on a
more virulent intensity. “But I do not fear. I can
oppose and overcome it. My agents are already at
work. I have given warning, too, as I have warned
you, and if pressed too hard, if threats prove futile,
if the peril becomes really alarming—well, you see!
You have seen for yourself, Dorson, how I can overcome
it. There is always a way—always a way.”</p>
<p>Graff had swung around in his chair and was pointing
to the lifeless black form in the corner.</p>
<p>Dorson gazed at him, at his extended hand and
quivering fingers, at his drawn, bearded face, indescribably
malevolent, and with that terrible abnormal
gleam and glitter in his frowning eyes, and Dorson
felt, with blood chilled and flesh gone cold and
clammy, that he was gazing at a madman or a devil
incarnate.</p>
<p>“Yes, yes, I have seen enough, Graff, more than
enough,” he said hoarsely, lips twitching. “What
more need be said?”</p>
<p>“Nothing more.” Professor Graff turned coldly
calm again. “You have my instructions. I know you<span class="pagenum">[140]</span>
will obey them. We must not meet again until after
the trick has been turned, and then only secretly.”</p>
<p>“That suits me. Let’s be moving.”</p>
<p>“How did you come out here?”</p>
<p>“In a trolley car.”</p>
<p>“You may return part way with me. I’ll drop you
before entering town. Resume your disguise, then
see whether the hall and veranda are deserted.”</p>
<p>Dorson arose and hastened to obey. He returned in
a few seconds, saying quietly:</p>
<p>“Come on. There’s no one around.”</p>
<p>There was one still around, nevertheless, still lying
low amid the rank grass and shrubbery that had served
to conceal him.</p>
<hr class="chap" />
<p><span class="pagenum">[141]</span></p>
<div style="break-after:column;"></div><br />