"No doubt, but if you have made a study of Mr. Gillespie's habits, you have learned that he is given to sudden sallies from his home. He will be found, I assure you, in the same house as Mille-fleurs. I hope we may make no mistakes in locating this house correctly. I hardly think we shall. The men I have chosen for the job are both keen and reliable; besides, for a gentleman of his antecedents, Mr. Gillespie shows a startling indifference to the result of his peculiar escapades. A strange man, Mr. Outhwaite."

"Very," I ejaculated abstractedly enough. My thoughts were with a possibility suggested by his words. Pursuing it, I said, "The letter I saw Mr. Gillespie read was from her, then? I noticed that it caused him great agitation, even from where I stood on the other side of the street."

The old detective smiled instinctively at my reckless betrayal of the part I had played in this scene, but made no reference to the fact itself, possibly because he was as well acquainted with my movements as I was myself. He only gave utterance to an easy-toned, "Exactly!" which seemed not only to settle this matter, but some others then inflaming my curiosity.

"We have been waiting a long time for some such communication to pass between them," he presently resumed, with a benevolent condescension, springing, perhaps, from our close contact in that jolting cab. "Otherwise, we should have taken him to-day, and in his own house. We have had great difficulty in holding the reporters back and even in keeping our own men quiet. It was desirable, you see, to take them together."

"And couldn't she be found? Wasn't she at Mother Merry's?"

"Not lately. No one answering to her description has shown up there for days. She seems to have fled from that place, alarmed, no doubt, by the interest shown in her by the young gentleman who got speech with her at the cost of a couple of silver dollars."

I began to note the corners as we passed them.

"Then we are not going to Mother Merry's?" I observed.

"No, we are not going to Mother Merry's."

"Yet we are not far from the docks," I remarked, as I caught transitory glimpses of the unmistakable green and red lights of the ferry-boats shining mistily on the left.