"Captain Rotherby," he said, "you do not seem to appreciate the position in which you stand. You are young, and life is hot in your veins, and yet to-day, as you sit there, your liberty is forfeit,—perhaps even, if Tapilow should die, your life! Have you ever heard any stories, I wonder," he added, leaning a little toward me, "about French prisons?"

"Are you trying to frighten me, Louis?" I asked.

"No!" he answered, "but I want you to realize that you are in a very serious position."

"I know that," I answered. "Don't think, Louis," I continued, "that what I did last night was the result of a rash impulse. I had sworn since a certain day in the autumn of last year that the first time I came face to face with that man, whether it was in the daytime or the nighttime, in a friend's house or on the street, I would punish him. Well, I have kept my word. I had to. I have had my fill of vengeance. He can go through the rest of his life, so far as I am concerned, unharmed. But what I did, I was bound to do, and I am ready to face the consequences, if necessary."

Louis nodded sympathetically.

"Monsieur," said he, "you have but to talk like that to convince the men whom you will meet in a few moments that you had a real grievance against Tapilow, and all may yet be well."

"Who are these men?" I asked. "Is it a police court to which you are taking me?"

"Monsieur," Louis answered, "there are things which I cannot any longer conceal from you. I myself, believe me, am merely an outsider. I am, as you know, a hardworking man with a responsible position and a family to support. But here in Paris I come on to the fringe of a circle of life with which I have no direct connection, and yet whose happenings sometimes touch upon the lives of my friends and intimates. It is a circle of life into which is drawn much that is splendid, much that is brilliant; but, monsieur, it is life outside the law, life which does as it thinks fit, which lives its own way, and recognizes no laws save its own interests."

I nodded.

"Go on, Louis, please," I said, "Tell me, for example, who these men are whom I am going to meet."