One day M. Darzac was taking a walk in the mountains. The asylum was not far away—in fact, only a few steps from the Italian frontier—and every preparation for the reception of “the unfortunate man” had been made some time beforehand. Brignolles, before leaving for Paris at all, had made arrangements with the proprietor and had presented to him his proofs of relationship, and his representative—Larsan himself. There are certain directors of such institutions who do not ask for explanations, provided that the provisions of the law are complied with—and that one pays well. And both these conditions were easily carried out. And such things are done every day!

“But how did you find out all these things?” I demanded of Rouletabille.

“You remember, my friend,” the reporter replied, “that little piece of paper which you brought back to the Château of Hercules on the day when, without giving me any warning, you took it upon yourself to follow the trail of the excellent Brignolles, who had come to make a short stay in the Midi? That bit of paper, which bore the heading of the Sorbonne and the two syllables, bonnet, gave me the most important assistance. First of all, the circumstances under which you found it—you recollect that you picked it up after you had seen Larsan and Brignolles?—rendered it precious to me. And then the place where it had been thrown was nearly a revelation for me when I began to take up the search for the real Darzac, after I had gained the conviction that his was ‘the body too many’ which had been tied up in the sack and carried out in it.”

And Rouletabille went on in the simplest manner possible, taking me in his narrative over the different phases necessary for my comprehension of the mysteries which, up to that time, had remained so inexplicable to every one of us. The first step in his reasoning had come from the conclusions which he had drawn from the fact that the paint on the drawing would dry less than fifteen minutes after it had been laid on, and following that, the other formidable fact that a lie must have been told by one of the two manifestations of Darzac. Bernier, under the cross examination to which Rouletabille subjected him before the return of the man who had carried the sack, had reported the lying words of the man whom everyone had believed to be Darzac. That was what had astonished Bernier—that the man who had come in at six o’clock had not told him that the man who had entered at six o’clock was not he! He was trying to conceal the fact that there existed a second manifestation of Darzac and he would have had no interest in concealing it, if his own personality had been the true one. That was clear as the light of day! When the horror of the thing dawned upon Rouletabille, he nearly swooned. His limbs refused to support him; his teeth chattered; everything grew black in front of his eyes. But he was not entirely without hope, even yet. Bernier might have been mistaken. Perhaps he had not correctly understood the words which M. Darzac had spoken in his amazement and confusion! Rouletabille decided that he himself would question M. Darzac. Then he would soon see. How he longed for his return! It would be for M. Darzac himself to “close the circle.” He waited impatiently—and when Darzac returned how the young reporter’s feeble hopes were crushed! “Did you look at the man’s face?” he had asked; and when the so-called Darzac replied, “No—I did not look at him!” Rouletabille could hardly hide his joy. It would have been so easy for Larsan to have answered, “I saw him. The face was that of Larsan!” And the young man had not understood that this was the last piece of malice—the furthest limit of hatred in the mind of the villain—and, too, one which fitted so well into his role. The real Darzac would not have acted otherwise. He would have gotten rid of his frightful booty as soon as possible without wishing to look at it. But what could all the artifices of a Larsan accomplish against the reasonings of a Rouletabille? The false Darzac, under the questionings of Rouletabille had “closed the circle.” He had lied. Now Rouletabille knew! And besides his eyes, which always looked behind the reason, could see now.

But what was to be done? Could he expose Larsan immediately and, perhaps, give him a chance to escape? Could he reveal to his mother the fact that she was married to Larsan and had helped him to kill Darzac? No—a thousand times no! He felt the need of reflection—of combining circumstances and possibilities. He wished to strike a sure blow when he was ready to strike at all. He asked for twenty-four hours. He made sure of the safety of the Lady in Black by begging her to take the unoccupied room in Professor Stangerson’s suite and he made her take a secret oath that she would not leave the château. He deceived Larsan by making him think that he was firmly convinced of the guilt of Old Bob. And when Walter rushed into the château with his empty sack the first gleam of hope that Darzac might still be alive dawned upon his mind. At last, he rushed off to find him, dead or living. He had in his possession the revolver belonging to the real Darzac which he had found in the Square Tower—a new revolver of which he had noticed the style in a shop at Mentone. He went to that shop; he showed the clerk the revolver; he learned that the weapon had been purchased a few days before by a man of whom he was given a description—a soft hat, a loose gray overcoat and a heavy beard. From there he lost all trace of the man, but he was not discouraged. He took up another trail, or, rather, he resumed that one which had led Walter to the gulfs of Castillon. When he arrived there, he did what Walter had not done. The latter, as soon as he had found the sack, looked for nothing more but hurried back to the Fort of Hercules. But Rouletabille, on the contrary, continued to follow the scent—and he perceived that this scent (which consisted of the exceptional clearness of the impressions left by the two wheels of the little English cart) instead of going back toward Mentone, after having stopped at the abyss of Castillon, went toward the other side, crossing by the mountain toward Sospel. Sospel! Had not Brignolles been reported as having gone to Sospel? Brignolles! Rouletabille remembered my sudden and interrupted journey. What could Brignolles be doing in these parts? His presence might be closely allied to the solution of the mystery. Certainly, the reappearance and disappearance of the true Darzac suggested the idea that he must have been kept somewhere in confinement. But where? Brignolles, who was undoubtedly in the confidence of Larsan, had not made the journey from Paris for nothing. Perhaps he had come at that critical moment to watch over this place of confinement. Meditating thus and pursuing the logical tenor of his reasoning, Rouletabille had questioned the landlord of the inn near the Castillon tunnel, who had acknowledged to him that he had been very much puzzled the day before by the passage through the tunnel of a man who perfectly answered the description which had been given by the gunsmith. This man had entered the tavern to drink. His manner and appearance were so strange that the landlord had feared that he might have escaped from the sanitarium. Rouletabille felt that he was on the right track and asked as indifferently as he could, “You have a sanitarium near here then?” “Oh, yes,” replied the landlord; “the Mount Barbonnet sanitarium for mental diseases.” It was at this point that the memory of the two syllables “bonnet” flashed in full significance upon the brain of Rouletabille. Henceforth, he had no longer any doubt that the real Darzac had been immolated by the false one as a madman in the sanitarium of Mount Barbonnet. He was resolved to know everything and to venture everything! He was certain that as a reporter of the Epoch he possessed the means of loosening the tongue of proprietors of sanitariums of the kind which take college professors as patients and ask no questions. He hired a carriage and had himself driven to Sospel, which is at the foot of the mountains. He realized that he was running the chance of encountering Brignolles. But, fortunately, nothing of the kind happened and the young man reached Mount Barbonnet and the sanitarium in safety. His mind was filled now with the thought that he was at last—definitely—to learn what had become of Robert Darzac! For at the moment that the sack had been found without the corpse—from the moment that the tracks of the little carriage descended toward Sospel or elsewhere and lost themselves; from the moment that he had discovered that Larsan had not considered it prudent to relieve himself of Darzac by throwing him in the sack into one of the gulfs of Castillon, Rouletabille had believed that Larsan might have found it to his interest to return the living Darzac to the madhouse at Sospel. And the reasoning powers of Rouletabille showed him that this might well be so. Darzac living might be more useful to Larsan than Darzac dead. What hostage would he have otherwise on the day when Mathilde should discover his imposture?

And Rouletabille had guessed aright. At the very door of the asylum, he had encountered Brignolles. Immediately, without warning, he had seized him by the throat and threatened him with his revolver. Brignolles was a coward. He entreated Rouletabille to spare him, vowing that Darzac was living. A quarter of an hour later Rouletabille knew the whole story. But the revolver had not sufficed, for Brignolles, who feared and hated the thought of death, loved life and everything which renders life desirable, particularly money. Rouletabille had not much trouble to convince him that he was lost if he did not betray Larsan and that he had much to gain if he helped the Darzac family to extricate itself from the present situation without scandal. At the close of the interview, both men entered the institution and were there received by the director, who listened to what they had to say with an amazement which was soon transformed into terror and later to the greatest affability which showed itself in immediate preparations for the release of Robert Darzac.

Darzac, by the miraculous chance which I have already explained, had sustained only a very slight injury from a wound which might easily have been mortal. Rouletabille, almost wild with joy, took him at once to Mentone. I will pass over the transports of both the rescuer and the rescued. They had disposed of Brignolles by agreeing to meet him in Paris for the settling of the accounts. On the journey, Rouletabille learned from the lips of Darzac that the Sorbonne Professor in his prison had a few days before happened to see the newspaper which spoke of the fact that M. and Mme. Darzac, whose wedding had just taken place in Paris, were guests at the Fort of Hercules. He had no further to look in order to comprehend why all his misfortunes had taken place and it was not difficult to guess who had had the fantastic audacity to take his place at the side of the unfortunate woman whose still wavering mind would have rendered so wild an enterprise not impossible. This discovery seemed to give him strength which he had not guessed that he possessed. After having stolen the overcoat of the director in order to conceal his asylum garb and having found a purse containing an hundred francs in the pocket, he had succeeded, at the risk of his life, in scaling a wall which under any other circumstances he would certainly have found insurmountable, and he had gone to Mentone. He had hastened to the Fort of Hercules. And he had seen Darzac with his own eyes! He had seen his very self. He spent a few hours in making himself so like his double in dress and appearance that the other Darzac himself might have been puzzled to find out which was which. His plan was simple. He would make his way into the Fort of Hercules in his own proper person—would enter the apartment of Mathilde and show himself to the other man in Mathilde’s presence, confounding him with the truth. He had questioned the people of the coast and had learned that the Darzacs’ suite was located at the back part of the Square Tower. “The Darzacs’ suite”! All that he had suffered up to that time seemed like nothing in comparison with what he felt at those words. And this suffering had been without surcease until he had seen with his own eyes, at the time of the corporeal demonstration of the possibility of the “body too many,” the Lady in Black. Then he had understood all. Never would she have dared to look at him like that, never would have so joyously flown to the refuge of his arms, if for a single instant, in body or in spirit, she had been the victim of the machinations of that other man and had belonged to him as his wife. Robert Darzac and Mathilde had been separated—but they had never lost each other!

Before putting his project into execution, Darzac had purchased a revolver at Mentone, had disembarrassed himself of his overcoat which he had managed to lose, believing that it would be a means of identification, had procured a suit of clothes which in color and in cut was the counterpart of that worn by the other Darzac and had waited until five o’clock—the hour at which he had resolved to act. He had hidden himself behind the Villa Lucie, high up on the boulevard at Garavan, at the top of a little hillock from which he could see plainly all that was passing in the château. When he had passed by us and we had both seen him he had had a fierce desire to cry out and tell us who he was, but he had strength of mind enough to contain himself, desiring to be recognized first of all by the Lady in Black. This hope alone sustained his steps. This only was worth the trouble of living and an hour afterward, when he had had the life of Larsan at his disposal while the latter sat in the same room with his back turned to him, writing letters, he had not even been tempted by the idea of vengeance. After so many sorrows, there was no room in Robert Darzac’s heart for hatred of Larsan; it was too full of love for the Lady in Black. Poor dear pitiful M. Darzac!

We know the rest of the adventure. That which I did not know was the way in which the true M. Darzac had penetrated a second time into the Fort of Hercules and had obtained entrance a second time into the recess hidden by the panel. And Rouletabille told me how on the same night that he had taken M. Darzac to Mentone, he had learned through the flight of Old Bob that there existed an entrance to the castle through the oubliette and so he had, by the help of a little boat, smuggled M. Darzac into the château by the way which Old Bob had taken in going out. Rouletabille wished to be master of the hour when he came to confound Larsan and strike him down. On that night it was too late to act, but he felt that he could count upon finishing up the affair on the night following. The only thing was how to hide M. Darzac on the peninsula. And with the aid of Bernier, he had found him a quiet, deserted little corner in the New Château.

At this point of the narrative, I could not hinder myself from interrupting Rouletabille with a cry which had the effect of sending him into a burst of laughter.