He entered my room just before one o’clock in the morning, tired and dusty, for he appeared to have walked a long distance. I had some cognac and a syphon of seltzer awaiting him, and sinking exhausted into a chair, he took a long and refreshing drink before he spoke.

“Well?” he said with a sigh. “You have been wondering why I disappeared so mysteriously—eh? The fact is I was compelled. On making inquiry of a shoemaker who has a little shop near Charles Rabel’s house I learned that the man for whom we are searching lived in a flat on the first floor of the house kept by a widow named Cailliot. But he was frequently absent in England or in Italy. Only for short spells was he there, for he was a commercial traveller representing a Lyons firm of silkweavers. As we were speaking, the shoemaker pointed to a rather smart young woman who was at that moment leaving the house, and said: ’Look! That is Mademoiselle Jacquelot, the fiancée of Monsieur Charles! She might tell you where he is. I do not think he is at home to-day. I saw him four days ago and spoke to him as he passed. But I believe he has left again!’ I thanked him, and at once followed Mademoiselle, hence I had no time to tell you, for I had no idea where she was going. I saw that by following Rabel’s fiancée I might gain some useful knowledge. She walked to the station, and took a ticket for Castelsarrasin. I did the same. We had half an hour to wait, but I spent it patiently, and when we left I travelled alone with her in the same compartment. Soon I managed to get into conversation with her, whereupon I mentioned that I had a friend, Monsieur Charles Rabel, in Montauban, and that we had met in Paris. He had once shown me her photograph and I believed I was not mistaken that she was Mademoiselle Jacquelot. At first she was surprised, but I told her a very plausible story, whereupon she explained that Charles had gone to Toulouse on business three days before, but that he was returning at noon to-morrow. She herself lived in Castelsarrasin.”

“But do you anticipate that we shall discover in Charles Rabel the notorious Despujol?” I inquired eagerly.

Rivero raised his shoulders and elevated his black eyebrows, saying:

“From facts I gathered from Mademoiselle concerning him I certainly think that we are really upon his track. It hardly seems possible, but we must remain in patience till to-morrow. Then, if we find our surmise correct, we must act with the greatest caution if we are to watch him to Nîmes where he is to meet your mysterious friend—the man whose name you refuse to reveal.”

“When they meet you will at once recognize him,” I said. “I may be mistaken,” I added. “But I do not anticipate that I am. If all goes well, then you will arrest the notorious Despujol.”

“I only wish that the fellow would fall into my hands,” replied my companion. “If so, then revelations will be made that will startle Europe.”

“And incidentally gain you promotion in the service—eh?” I laughed.

He nodded and admitted: