The detective began to stroll about the place, as though in deep thought. His eyes were fixed, however, upon the face of the man in the chair. It was a determined face, as the thin lips and close-set eyes showed, but Duvall noted with satisfaction signs of weakness about the half-open mouth. The man was undoubtedly sleeping soundly.

Duvall was at a loss to know just what to do. He was convinced that the ivory snuff box, upon the recovery of which Monsieur Lefevre had assured him the honor of France itself depended, was within ten feet of him, yet he could do nothing, apparently, at the moment, to regain it. To arrest the man, except on French soil, was out of the question. Even could he do so, the package which the latter had so carelessly slipped into his overcoat pocket in Monsieur Perrier's shop might contain, after all, but a harmless box of rice powder, and he would be hard put to explain satisfactorily his action. On the other hand, the presence of the snuff box on the man's person, supposing this to be beyond question, was not in itself sufficient to warrant placing him under arrest. He might claim it as his own property. There was nothing to show that it had been stolen. Clearly the only thing to do was to attempt to get the box from him by stealth.

After a long time spent in debating the matter pro and con., Duvall threw himself into a chair close to the one which the man he was watching occupied, and pretended to sleep. Of Dufrenne he saw nothing. After perhaps an hour, the card game ceased, the players retired to their staterooms, or to near-by sofas, and a steward began to lower the lights. Presently not a sound was to be heard throughout the saloon, except the chorus of snores from the sleeping passengers, and the creaking of the vessel as she plunged into the heavy Channel swell.

The detective slowly advanced his foot, and with infinite patience, began to draw toward him the small leather satchel which lay beside the man's chair. He did this so slowly and imperceptibly that the operation occupied the best part of a quarter of an hour. At last the bag was safely pushed beneath the folds of his overcoat, which he had removed on sitting down, and now lay thrown carelessly over his knees.

He bent over, noiselessly, his hand beneath the folds of the coat, and began to fumble with the catch of the satchel. In a few moments he managed to open it, and with nervous fingers examined the contents of the bag. Guided by the sense of touch only, he was able to identify successively a razor case, a shaving brush, a cotton nightshirt and a number of other articles of an ordinary and usual nature. He had almost given up the search, when his fingers closed about a small round object, done up in paper. His heart gave a leap of joy. He could feel the coarse string with which the package was bound and could tell from its lightness that it contained probably what he sought. In a moment he had drawn it noiselessly from the satchel and transferred it to the pocket of his coat.

The process of closing the bag and returning it to its former position was accomplished without waking the sleeping occupant of the near-by chair. Duvall was conscious of a feeling of exultation. He yawned, stretched himself, glanced with great deliberation at his watch, then rose and quietly left the room.

The decks seemed deserted. After some trouble he managed, however, to locate Dufrenne, standing beside the rail in the shadow of one of the lifeboats. He went up to him and saw that his teeth were chattering with the cold. Duvall could not repress a feeling of admiration for the little old Frenchman, who, rather than risk for a moment his identification by the man they were following, had elected to spend the night wandering about the decks. His patriotism was proof against even the cold.

Duvall touched him gently on the arm. "I have secured it," he remarked, quietly.

Dufrenne turned. "The snuff box?" he whispered excitedly.

The detective nodded, and cautiously drew the circular package from his pocket. "It was in his satchel," he remarked, as he began to remove the string.