daughter did lose the key, and that she did not tell me of it,
   wishing to spare any anxiety, and that she begged whoever had found
   it to write to the poste restante.  She evidently feared that, by
   giving our address, inquiries would have resulted that would have
   apprised me of the loss of the key.  It was quite logical, quite
   natural for her to have taken that course--for I have been robbed
   once before."
   "Where was that, and when?" asked the Chief of the Surete.
   "Oh!  many years ago, in America, in Philadelphia.  There were
   stolen from my laboratory the drawings of two inventions that might
   have made the fortune of a man.  Not only have I never learnt who
   the thief was, but I have never heard even a word of the object of
   the robbery, doubtless because, in order to defeat the plans of the
   person who had robbed me, I myself brought these two inventions
   before the public, and so rendered the robbery of no avail.  From
   that time on I have been very careful to shut myself in when I am
   at work.  The bars to these windows, the lonely situation of this
   pavilion, this cabinet, which I had specially constructed, this
   special lock, this unique key, all are precautions against fears
   inspired by a sad experience."
   "Most interesting!" remarked Monsieur Dax.
   Monsieur Rouletabille asked about the reticule.  Neither Monsieur
   Stangerson nor Daddy Jacques had seen it for several days, but a few
   hours later we learned from Mademoiselle Stangerson herself that the
   reticule had either been stolen from her, or she had lost it.  She
   further corroborated all that had passed just as her father had
   stated.  She had gone to the poste restante and, on the 23rd of
   October, had received a letter which, she affirmed, contained nothing
   but a vulgar pleasantry, which she had immediately burned.
   To return to our examination, or rather to our conversation.  I must
   state that the Chief of the Surete having inquired of Monsieur
   Stangerson under what conditions his daughter had gone to Paris on
   the 20th of October, we learned that Monsieur Robert Darzac had
   accompanied her, and Darzac had not been again seen at the chateau
   from that time to the day after the crime had been committed.  The
   fact that Monsieur Darzac was with her in the Grands Magasins de la
   Louvre when the reticule disappeared could not pass unnoticed, and,
   it must be said, strongly awakened our interest.
   This conversation between magistrates, accused, victim, witnesses
   and journalist, was coming to a close when quite a theatrical
   sensation--an incident of a kind displeasing to Monsieur de
   Marquet--was produced.  The officer of the gendarmes came to
   announce that Frederic Larsan requested to be admitted,--a request
   that was at once complied with.  He held in his hand a heavy pair
   of muddy boots, which he threw on the pavement of the laboratory.
   "Here," he said, "are the boots worn by the murderer.  Do you
   recognise them, Daddy Jacques?"
   Daddy Jacques bent over them and, stupefied, recognised a pair of
   old boots which he had, some time back, thrown into a corner of his
   attic.  He was so taken aback that he could not hide his agitation.
   Then pointing to the handkerchief in the old man's hand, Frederic
   Larsan said:
   "That's a handkerchief astonishingly like the one found in The
   Yellow Room."
   "I know," said Daddy Jacques, trembling, "they are almost alike."
   "And then," continued Frederic Larsan, "the old Basque cap also
   found in The Yellow Room might at one time have been worn by Daddy
   Jacques himself.  All this, gentlemen, proves, I think, that the
   murderer wished to disguise his real personality.  He did it in a
   very clumsy way--or, at least, so it appears to us.  Don't be
   alarmed, Daddy Jacques; we are quite sure that you were not the
   murderer; you never left the side of Monsieur Stangerson.  But if
   Monsieur Stangerson had not been working that night and had gone
   back to the chateau after parting with his daughter, and Daddy
   Jacques had gone to sleep in his attic, no one would have doubted
   that he was the murderer.  He owes his safety, therefore, to the
   tragedy having been enacted too soon,--the murderer, no doubt,
   from the silence in the laboratory, imagined that it was empty, and
   that the moment for action had come.  The man who had been able to
   introduce himself here so mysteriously and to leave so many evidences
   against Daddy Jacques, was, there can be no doubt, familiar with the
   house.  At what hour exactly he entered, whether in the afternoon or
   in the evening, I cannot say.  One familiar with the proceedings and
   persons of this pavilion could choose his own time for entering The
   Yellow Room."
   "He could not have entered it if anybody had been in the laboratory,"
   said Monsieur de Marquet.
   "How do we know that?" replied Larsan.  "There was the dinner in
   the laboratory, the coming and going of the servants in attendance.
   There was a chemical experiment being carried on between ten and
   eleven o'clock, with Monsieur Stangerson, his daughter, and Daddy
   Jacques engaged at the furnace in a corner of the high chimney.
   Who can say that the murderer--an intimate!--a friend!--did
   not take advantage of that moment to slip into The Yellow Room,
   after having taken off his boots in the lavatory?"
   "It is very improbable," said Monsieur Stangerson.
   "Doubtless--but it is not impossible.  I assert nothing.  As to
   the escape from the pavilion--that's another thing, the most
   natural thing in the world."
   For a moment Frederic Larsan paused,--a moment that appeared to
   us a very long time.  The eagerness with which we awaited what he
   was going to tell us may be imagined.
   "I have not been in The Yellow Room," he continued, "but I take it
   for granted that you have satisfied yourselves that he could have
   left the room only by way of the door; it is by the door, then, that
   the murderer made his way out.  At what time?  At the moment when it
   was most easy for him to do so; at the moment when it became most
   explainable--so completely explainable that there can be no other
   explanation.  Let us go over the moments which followed after the
   crime had been committed.  There was the first moment, when Monsieur
   Stangerson and Daddy Jacques were close to the door, ready to bar
   the way.  There was the second moment, during which Daddy Jacques
   was absent and Monsieur Stangerson was left alone before the door.
   There was a third moment, when Monsieur Stangerson was joined by
   the concierge.  There was a fourth moment, during which Monsieur
   Stangerson, the concierge and his wife and Daddy Jacques were before
   the door.  There was a fifth moment, during which the door was burst
   open and The Yellow Room entered.  The moment at which the flight is
   explainable is the very moment when there was the least number of
   persons before the door.  There was one moment when there was but
   one person,--Monsieur Stangerson.  Unless a complicity of silence
   on the part of Daddy Jacques is admit 
					     					 			ted--in which I do not believe
   --the door was opened in the presence of Monsieur Stangerson alone
   and the man escaped.
   "Here we must admit that Monsieur Stangerson had powerful reasons
   for not arresting, or not causing the arrest of the murderer, since
   he allowed him to reach the window in the vestibule and closed it
   after him!--That done, Mademoiselle Stangerson, though horribly
   wounded, had still strength enough, and no doubt in obedience to the
   entreaties of her father, to refasten the door of her chamber, with
   both the bolt and the lock, before sinking on the floor.  We do not
   know who committed the crime; we do not know of what wretch Monsieur
   and Mademoiselle Stangerson are the victims, but there is no doubt
   that they both know!  The secret must be a terrible one, for the
   father had not hesitated to leave his daughter to die behind a door
   which she had shut upon herself,--terrible for him to have allowed
   the assassin to escape.  For there is no other way in the world to
   explain the murderer's flight from The Yellow Room!"
   The silence which followed this dramatic and lucid explanation was
   appalling.  We all of us felt grieved for the illustrious professor,
   driven into a corner by the pitiless logic of Frederic Larsan, forced
   to confess the whole truth of his martyrdom or to keep silent, and
   thus make a yet more terrible admission.  The man himself, a
   veritable statue of sorrow, raised his hand with a gesture so solemn
   that we bowed our heads to it as before something sacred.  He then
   pronounced these words, in a voice so loud that it seemed to exhaust
   him:
   "I swear by the head of my suffering child that I never for an
   instant left the door of her chamber after hearing her cries for
   help; that that door was not opened while I was alone in the
   laboratory; and that, finally, when we entered The Yellow Room, my
   three domestics and I, the murderer was no longer there!  I swear
   I do not know the murderer!"
   Must I say it,--in spite of the solemnity of Monsieur Stangerson's
   words, we did not believe in his denial.  Frederic Larsan had shown
   us the truth and it was not so easily given up.
   Monsieur de Marquet announced that the conversation was at an end,
   and as we were about to leave the laboratory, Joseph Rouletabille
   approached Monsieur Stangerson, took him by the hand with the
   greatest respect, and I heard him say:
   "I believe you, Monsieur."
   I here close the citation which I have thought it my duty to make
   from Monsieur Maleine's narrative.  I need not tell the reader that
   all that passed in the laboratory was immediately and faithfully
   reported to me by Rouletabille.
   CHAPTER XII
   Frederic Larsan's Cane
   It was not till six o'clock that I left the chateau, taking with me
   the article hastily written by my friend in the little sitting-room
   which Monsieur Robert Darzac had placed at our disposal.  The
   reporter was to sleep at the chateau, taking advantage of the to me
   inexplicable hospitality offered him by Monsieur Robert Darzac, to
   whom Monsieur Stangerson, in that sad time, left the care of all his
   domestic affairs.  Nevertheless he insisted on accompanying me to
   the station at Epinay.  In crossing the park, he said to me:
   "Frederic is really very clever and has not belied his reputation.
   Do you know how he came to find Daddy Jacques's boots?--Near the
   spot where we noticed the traces of the neat boots and the
   disappearance of the rough ones, there was a square hole, freshly
   made in the moist ground, where a stone had evidently been removed.
   Larsan searched for that stone without finding it, and at once
   imagined that it had been used by the murderer with which to sink
   the boots in the lake.  Fred's calculation was an excellent one,
   as the success of his search proves.  That escaped me; but my mind
   was turned in another direction by the large number of false
   indications of his track which the murderer left, and by the measure
   of the black foot-marks corresponding with that of Daddy Jacques's
   boots, which I had established without his suspecting it, on the
   floor of The Yellow Room.  All which was a proof, in my eyes, that
   the murderer had sought to turn suspicion on to the old servant.  Up
   to that point, Larsan and I are in accord; but no further.  It is
   going to be a terrible matter; for I tell you he is working on wrong
   lines, and I--I, must fight him with nothing!"
   I was surprised at the profoundly grave accent with which my young
   friend pronounced the last words.
   He repeated:
   "Yes terrible!--terrible!  For it is fighting with nothing, when
   you have only an idea to fight with."
   At that moment we passed by the back of the chateau.  Night had come.
   A window on the first floor was partly open.  A feeble light came
   from it as well as some sounds which drew our attention.  We
   approached until we had reached the side of a door that was situated
   just under the window.  Rouletabille, in a low tone, made me
   understand, that this was the window of Mademoiselle Stangerson's
   chamber.  The sounds which had attracted our attention ceased, then
   were renewed for a moment, and then we heard stifled sobs.  We were
   only able to catch these words, which reached us distinctly: "My
   poor Robert!"--Rouletabille whispered in my ear:
   "If we only knew what was being said in that chamber, my inquiry
   would soon be finished."
   He looked about him.  The darkness of the evening enveloped us; we
   could not see much beyond the narrow path bordered by trees, which
   ran behind the chateau.  The sobs had ceased.
   "If we can't hear we may at least try to see," said Rouletabille.
   And, making a sign to me to deaden the sound of my steps, he led
   me across the path to the trunk of a tall beech tree, the white
   bole of which was visible in the darkness.  This tree grew exactly
   in front of the window in which we were so much interested, its
   lower branches being on a level with the first floor of the chateau.
   From the height of those branches one might certainly see what was
   passing in Mademoiselle Stangerson's chamber.  Evidently that was
   what Rouletabille thought, for, enjoining me to remain hidden, he
   clasped the trunk with his vigorous arms and climbed up.  I soon
   lost sight of him amid the branches, and then followed a deep
   silence.  In front of me, the open window remained lighted, and I
   saw no shadow move across it.  I listened, and presently from above
   me these words reached my ears:
   "After you!"
   "After you, pray!"
   Somebody was overhead, speaking,--exchanging courtesies.  What was
   my astonishment to see on the slippery column of the tree two human
   forms appear and quietly slip down to the ground.  Rouletabille had
   mounted alone, and had returned with another.
   "Good evening, Monsieur Sainclair!"
   It was Frederic Larsan.  The detective had already occupied the post
   of observation when my young friend had thought to reach it alone.
   N 
					     					 			either noticed my astonishment.  I explained that to myself by the
   fact that they must have been witnesses of some tender and despairing
   scene between Mademoiselle Stangerson, lying in her bed, and Monsieur
   Darzac on his knees by her pillow.  I guessed that each had drawn
   different conclusions from what they had seen.  It was easy to see
   that the scene had strongly impressed Rouletabille in favour of
   Monsieur Robert Darzac; while, to Larsan, it showed nothing but
   consummate hypocrisy, acted with finished art by Mademoiselle
   Stangerson's fiance.
   As we reached the park gate, Larsan stopped us.
   "My cane!" he cried.  "I left it near the tree."
   He left us, saying he would rejoin us presently.
   "Have you noticed Frederic Larsan's cane?" asked the young reporter,
   as soon as we were alone.  "It is quite a new one, which I have
   never seen him use before.  He seems to take great care of it--it
   never leaves him.  One would think he was afraid it might fall into
   the hands of strangers.  I never saw it before to-day.  Where did he
   find it?  It isn't natural that a man who had never before used a
   walking-stick should, the day after the Glandier crime, never move
   a step without one.  On the day of our arrival at the chateau, as
   soon as he saw us, he put his watch in his pocket and picked up his
   cane from the ground--a proceeding to which I was perhaps wrong not
   to attach some importance."
   We were now out of the park.  Rouletabille had dropped into silence.
   His thoughts were certainly still occupied with Frederic Larsan's
   new cane.  I had proof of that when, as we came near to Epinay, he
   said:
   "Frederic Larsan arrived at the Glandier before me; he began his
   inquiry before me; he has had time to find out things about which
   I know nothing.  Where did he find that cane?" Then he added: "It
   is probable that his suspicion--more than that, his reasoning
   --has led him to lay his hand on something tangible.  Has this cane
   anything to do with it?  Where the deuce could he have found it?"
   As I had to wait twenty minutes for the train at Epinay, we entered
   a wine shop.  Almost immediately the door opened and Frederic Larsan
   made his appearance, brandishing his famous cane.
   "I found it!" he said laughingly.
   The three of us seated ourselves at a table.  Rouletabille never took
   his eyes off the cane; he was so absorbed that he did not notice a
   sign Larsan made to a railway employe, a young man with a chin
   decorated by a tiny blond and ill-kept beard.  On the sign he rose,
   paid for his drink, bowed, and went out.  I should not myself have
   attached any importance to the circumstance, if it had not been
   recalled to my mind, some months later, by the reappearance of the
   man with the beard at one of the most tragic moments of this case.
   I then learned that the youth was one of Larsan's assistants and had
   been charged by him to watch the going and coming of travellers at
   the station of Epinay-sur-Orge.  Larsan neglected nothing in any
   case on which he was engaged.
   I turned my eyes again on Rouletabille.
   "Ah,--Monsieur Fred!" he said, "when did you begin to use a
   walking-stick?  I have always seen you walking with your hands in
   your pockets!"
   "It is a present," replied the detective.
   "Recent?" insisted Rouletabille.
   "No, it was given to me in London."
   "Ah, yes, I remember--you have just come from London.  May I look
   at it?"
   "Oh!--certainly!"
   Fred passed the cane to Rouletabille.  It was a large yellow bamboo
   with a crutch handle and ornamented with a gold ring.  Rouletabille,
   after examining it minutely, returned it to Larsan, with a bantering
   expression on his face, saying:
   "You were given a French cane in London!"
   "Possibly," said Fred, imperturbably.