<p class="title"><SPAN name="CHAPTER_XIV" id="CHAPTER_XIV"></SPAN><i>CHAPTER XIV</i></p>
<p class="sub"><i>Clues</i></p>
<p>The carpenters and masons came and went in a very business-like way all
that morning, while we were closeted upstairs with our companion and
Chief Hallen.</p>
<p>After he left us, Moore and I walked down to the gate and around the
grounds, leaving Oakes to attend to details with Martin. Carpenters were
very busy around the dining-room, carrying in boards and implements, and
examining the woodwork and the balcony.</p>
<p>A few of the masons were about the grounds, engaged on small details,
and all seemed to be on good terms with Cook and his wife, and Annie.
Mike was busy at one end of the garden, and Maloney was not far off.</p>
<p>"This, Stone, is to be a day of events here. But things are being done
very quietly, are they not? You would suspect nothing out of the
way—far less <span class="pagenum"><SPAN name="Page_160" id="Page_160">[Pg 160]</SPAN></span>a hunt for a murderer or the investigation of a mystery,
would you?"</p>
<p>"No; were I not informed, I should think that Oakes had merely a gang of
laborers at work."</p>
<p>"He has that; but he has also a body of the best detectives, for the
purpose, to be had. Maloney and Mike are puzzling him considerably,
Stone; they are very close to one another always, and seem quite
intimate."</p>
<p>"Yes," I replied. "I have noticed it. They both show a great deal of
interest in these alterations. Have you noticed how Maloney is watching
O'Brien? He keeps him continually in sight."</p>
<p>We had approached the front door of the Mansion as we spoke. Oakes was
standing just outside, his eyes likewise upon the two gardeners. Our
last remarks were made in his presence, and he entered the conversation
with a quiet observation to the effect that Maloney seemed to fear that
Mike might not attend to his business, but that Mike <i>would</i>,
nevertheless.</p>
<p>I was obliged to acknowledge that I did not quite understand.</p>
<p><span class="pagenum"><SPAN name="Page_161" id="Page_161">[Pg 161]</SPAN></span></p>
<p>"Oh, Mike is a good laborer," he explained; "he needs no such watching,"
and there seemed to be a peculiar significance in his words. They were
stated in a slow, indifferent manner that caused me to look at the
speaker, but his face wore the inscrutable expression which I had
frequently seen before, and I learned nothing. I knew him well enough by
this time, however, to realize that something was taking shape in his
thoughts.</p>
<p>"Now, let us go inside," said he. "After lunch we will attack the final
solution of the manner in which these mysterious assaults were
performed. Like all such things, it will be simple enough, I know, and
the point remaining to determine will be not <i>how</i> it was done, but <i>by
whom</i>.</p>
<p>"I feel confident that that door in the cellar room leads upward to an
interspace which communicates with the dining-room through panels in the
walls. The peculiar noise—the swish—that I heard, resembled the sudden
sliding of a board, and it was the conviction that the person who
assaulted Moore disappeared into the wall which made me run downstairs.
I felt sure there would be some explanation of it below." <span class="pagenum"><SPAN name="Page_162" id="Page_162">[Pg 162]</SPAN></span></p>
<p>That afternoon a systematic search of the entire house was made. The
cellar room in which the assault upon Oakes had occurred was thoroughly
lighted and examined. The heap of rubbish which Mike had been
investigating at our previous visit proved to be composed of plaster and
bricks.</p>
<p>The wall in which the door was cut was found to be about three feet
thick, and one of the foundations of the house. It was solid, save for a
chimney-like opening which had been trapped with the door. Above, at the
level of the dining-room floor, the great wall ceased. From one edge was
continued upwards the original partition between that room and the
next—the parlor; but it was thin, and had evidently been recently
strengthened by another wall, slightly thicker, and built from the
opposite edge of the foundation, leaving a space between the two. Into
this space entered, at a certain point, the opening from the cellar room
below.</p>
<p>It was a peculiar arrangement. As Oakes remarked, the new wall had been
made with no regard to the economizing of space; for, had it been built
immediately back of the old, considerable room <span class="pagenum"><SPAN name="Page_163" id="Page_163">[Pg 163]</SPAN></span>would have been saved
for the parlor. One of the "carpenters" thought that the original idea
had been to utilize the space for closets. The only other possible use
for it, so far as we could discover, was the one which Oakes had
surmised—ventilation for the cellar. Still, to our ordinary minds, a
chimney would have answered that purpose quite as well.</p>
<p>A little further investigation, however, showed the top of the
foundation wall to be covered with cement well smoothed, and the walls
themselves were plastered. It was generally conceded, therefore, that
the first idea had been to use it as closet room, which could easily
have been done by cutting doors through the walls. As Oakes said, the
notion had evidently met with opposition and been abandoned, so
communication had been made with the cellar instead, and the roof opened
to afford ventilation.</p>
<p>The opening into the cellar was large. A man could easily enter it, and,
standing, reach the top of the foundation wall; then, by a little
exertion, he could raise himself into the intermural space. Oakes, Moore
and I proved this by actual experiment and <span class="pagenum"><SPAN name="Page_164" id="Page_164">[Pg 164]</SPAN></span>found that the passage was
quite wide enough to accommodate a man of average proportions.</p>
<p>I have said that the dining-room was finished in oak panels. These had
been reached from our side of the wall by removing the bricks and
mortar—the same stuff evidently which helped to form the rubbish heap
in the room below. One of the larger panels had been made to slide
vertically. It had been neatly done and had escaped detection from the
dining-room because of the overlapping of the other panels. Some dèbris
still remained between the walls.</p>
<p>"The fellow we are after knew of the space between the walls and worked
at the panel after the repairs were completed," was Oakes's remark.</p>
<p>"How do you know that?" asked Moore.</p>
<p>Oakes looked at him and smiled, then said: "Moore, where is your
reasoning ability? Do you think, if the panel had been tampered with at
the time the repairs were made, that the dèbris would have been left
behind? No! It would have been removed with the rest of the dirt."</p>
<p>We had gone to our rooms upstairs while the men <span class="pagenum"><SPAN name="Page_165" id="Page_165">[Pg 165]</SPAN></span>were hunting through
the tunnel to the well. They found nothing; everything was as we had
left it after our adventures there.</p>
<p>It seemed to us that, all things considered, the work on the panel must
have been done by someone within the household, or, at least, that some
of its members must have been involved in the matter.</p>
<p>"It may have been accomplished at night, however, and by an outsider,"
said Oakes. "The servants' quarters are separate from the house. Anyone
might easily have entered the cellar by the tunnel route. Still, there
may have been collusion also."</p>
<p>"It seems a nonsensical idea to leave the dèbris in the cellar," I said.</p>
<p>"No, I think not," was the answer. "The care-takers are afraid even to
enter that place. The miscreant knew that detection would be probable at
the hands of strangers only."</p>
<p>That evening Elliott and Martin left for New York. They were to bring
the negro boy, Joe, to Mona. Late at night, before we retired, Oakes
asked us to go with him into the parlor.</p>
<p>"What for?" said I.</p>
<p><span class="pagenum"><SPAN name="Page_166" id="Page_166">[Pg 166]</SPAN></span></p>
<p>"To forge another link in the chain—the strongest yet," he said.</p>
<p>"What?"</p>
<p>"Do you remember the cartridge I found in the cellar?"</p>
<p>"Yes, yes; but you did not pay much attention to it, I thought."</p>
<p>He looked gravely at me. "Stone, that cartridge probably corresponds in
calibre to the one which was used in the murder of Mark."</p>
<p>"Ah!" said Moore. "I had a notion of that myself. Why did you not tell
us your opinion before?"</p>
<p>"Because, when I found it, we were working on the Mansion affair only. I
divined the value of the find; but why should I have mentioned it? I was
not hunting the Mark murderer then."</p>
<p>"Quintus, you consummate fox—you worked Hallen well!"</p>
<p>"Not at all; business is business. What is the use of gossiping? There
are no ladies to be entertained in <i>my</i> profession, Doctor."</p>
<p>He led the way to the parlor—we meekly following—to where a cluster <span class="pagenum"><SPAN name="Page_167" id="Page_167">[Pg 167]</SPAN></span>
of arms hung upon the wall: one of those ornaments of crossed swords,
guns and a shield, so common in old houses.</p>
<p>He remarked that he had noticed these arms on his previous visit. He
looked at a revolver hanging across the shield, with a pouch beneath it,
and then suddenly, in surprise, said: "Last time I was here, a few weeks
ago, there was a large old-fashioned revolver here of 44 or 45 calibre.
I remember it well, being interested in firearms.</p>
<p>"This one now here is of a similar pattern and appearance, but of
smaller calibre, and newer. Look! The cartridges in this pouch are of
about 45 size; they belong to the old weapon and cannot be used with
this one."</p>
<p>"Again, some of them are missing; there were at least a dozen before,
now there are only three or four. The old revolver and some cartridges
have been taken away, and a newer weapon substituted."</p>
<p>"Indeed! But why?" said Moore sceptically.</p>
<p>"Partly because"—and Oakes was decisive, curt, master of the
situation—"because this one cannot be loaded. See!" He then tried to
turn the <span class="pagenum"><SPAN name="Page_168" id="Page_168">[Pg 168]</SPAN></span>chamber and showed us that the mechanism was faulty.</p>
<p>"The old revolver," said he in a low tone, "and some cartridges were
taken away, and in order that its absence should be less noticeable,
this one was left here—it being useless.</p>
<p>"Now, boys, the cartridge I found downstairs on the cellar floor is a
45-calibre and belongs to those of the pouch and the original revolver,
as you see."</p>
<p>He took it from his pocket and showed us that it did <i>not</i> fit the
weapon in his hand but matched the cartridges in the pouch. It belonged
to the <i>old</i> weapon.</p>
<p>"We are closing in," said I.</p>
<p>"Yes—the man of the robe has the old revolver and cartridges; he took
them within the last few days, finding his own weapon out of order. It
is he who is responsible for the mystery in this house—and in all
probability it is he who shot Winthrop Mark. You remember, the evidence
at the inquest showed that a heavy revolver had been used—a 44 or 45
calibre—exactly such an one as the old weapon which I saw here." <span class="pagenum"><SPAN name="Page_169" id="Page_169">[Pg 169]</SPAN></span></p>
<p>"Excellent, Oakes," remarked Moore. "There's only one objection."</p>
<p>"Yes, I know," said Oakes. "You were going to ask why the fellow did not
take all these cartridges and put his own in the pouch to match the
weapon he left here."</p>
<p>"Exactly," said Moore.</p>
<p>"Well," said the detective, "he either had no cartridges of his own
handy, or else, like all criminals, however smart, he tripped—the brain
of no man is capable of adjusting his actions precisely in every
detail."</p>
<p>"Guess you're right. No man can be perfect in his reasoning, and, no
matter how clever the criminal, he is almost certain to make an error
sooner or later," said Moore.</p>
<p>"Yes, but it takes peculiar power to discover it," I chirped. The events
of the day had tired me, and my mind was growing confused. I desired to
go to bed.</p>
<p>Oakes smiled slightly. "No, Stone; it takes study, worry and patient
reasoning to discover the <span class="pagenum"><SPAN name="Page_170" id="Page_170">[Pg 170]</SPAN></span>faulty link in a clever criminal's
logic—that is why there is a profession like mine."</p>
<p>I was half asleep, but I heard him continue: "We may consider we have
excellent cause to look for a man who has in his possession an ancient
revolver and some very old dirty cartridges covered with verdigris, like
these here."</p>
<p>"Murder will out," I interpolated.</p>
<p>"Yes, eventually, sometimes. However, it is easy to say, 'he who had
that revolver did the murder,' but as it may have been destroyed since
then, or thrown into the river, it is another thing to find the <i>man</i>."</p>
<p>We were crestfallen. Oakes himself looked wearied.</p>
<p>"I wish the whole Mansion was in the river, and there were a decent cafè
round here," protested Moore.</p>
<p>"You're a vigorous pair of assistants, I must say," said Quintus. "I
have some samples in my room. Come!" and we all adjourned.</p>
<hr class="chap" /><p><span class="pagenum"><SPAN name="Page_171" id="Page_171">[Pg 171]</SPAN></span></p>
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