The inspector slipped in like a ghost, and I followed him. Neither of us said anything further to the watchman; we went directly to Brake's place. He was not there. "I will wait a few minutes," I said. "I think he will be here. I must see Brake." The inspector glanced at me as one does at a fellow who is behaving a little out of the common course of human conduct; but he did not enter into conversation with me, seeing me averse to it. I sank down wearily upon Brake's biggest brown leather office chair, and put my head down upon his table. I was now thoroughly tired and confused. I wished with all my heart that I had gone straight home to Helen. The inspector and the watchman busied themselves in examining the building, for some purpose to which I paid no attention. They conversed in low tones, "I heard a noise at the door, sir, myself," the watchman said. "Why don't you tell him it was I?" I called; but I did not lift my head. I was too tired to trouble myself. I must have fallen into a kind of stupor. I do not know how long I had remained in this position and condition, whether minutes or hours; but when at last I roused myself, and looked about, a singular thing had happened. The inspector had gone. The watchman had gone. I was alone in the broker's office. And I was locked in. CHAPTER VI. So often and so idly it is our custom to say, I shall never forget! that the words scarcely cause a ripple of comment in the mind; whereas, in fact, they are among the most audacious which we ever take upon our lips. How know we what law of selection our memories will obey in that system of mental relations which we call "forever"? I, who believe myself to have obtained some especial knowledge upon this point, not possessed by all my readers, and to be more free than many another to use such language, still retreat before the phrase, and content myself with saying, "I have never forgotten." Up to this time I have never been able to forget the smallest detail of that night whose history I am now to record. It seems to me impossible in any set of conditions that memory could blot that experience from my being; but of that what know I? No more than I know of the politics of a meteor.