chance; he resolves to disappear, and so put his enemies off the scent. Now, follow me. Sophy is below in bed. She hears a noise in the upper part of the house; the brave girl creeps up-stairs from the basement as M. Felix creeps down-stairs from his apartments. He dare not betray himself. He seizes her, disguises his voice, and works upon her fears. Exit M. Felix; for as long or as short a time as he pleases, he is dead to the world. It is a wonder he does not take his revolver with him, but that is an oversight. In such a crisis one cannot think of everything. It may happen--for there is work for us to do, Agnold--that this oversight will work in our favor. I do not despair of tracing the revolver, and you did a good stroke when you wrote down such a description of the weapon as will enable you to identify it. There is no room for doubt that the man who presented himself to Mrs. Middlemore as a police official, and who sent her on a false errand to Bow Street Police Station, was Peterssen. Alone in M. Felix's room he appropriates the revolver; other things as well, perhaps; but of the revolver we are morally convinced. What is his object in going there? I will tell you. He has doubts of M. Felix's death; he believes it to be a trick, and he thinks he may find something in M. Felix's room which will put him on the track of the man who had slipped out of his power. Reasoning the mystery out in this open way is very satisfactory, Agnold. Mists disappear; we see the light. How does it strike you?" "You have convinced me, Bob," I said. "We will pursue the matter a little further. M. Felix is a man who is fond of pleasures which can be purchased only with money. Do you think he would voluntarily deprive himself of the means of obtaining it--for this is what his disappearance would lead him to, so long as he chose to conceal himself.