"Half-past twelve. And when do you say that you discovered this man on the floor?" "About a quarter to one. When I gave the alarm the landlady of the hotel and the servant came running to me immediately. They will be able to tell you what time it was; and I should say that the doctor was here within five minutes." The inspector turned to the doctor. "And what was the time, sir, when you arrived?" "I should say as nearly as possible about ten minutes to one. I lunch at one; I was just going to wash when I was called." "And how long do you say, sir, he had then been dead?" "He had probably been alive five minutes before." "Then, in that case, he must have been alive when this man says he entered the hall." The inspector pointed to me. "I do not say that. The man was stabbed in the back, under the left shoulder, probably just as he was in the act of entering the house. I have only made a superficial examination, but I think it probable that the blow killed him in an instant--before, that is, he could breathe the breath which he was breathing, as it were, right out. And I do say this, that if this gentleman had entered the hall a minute before he actually did, he would have seen the man in the very act of being murdered." The inspector turned again to me. "Where did this Mr. Duncan Rothwell live?" "That also is more than I can tell you. The fact is, I know nothing whatever about him. A firm of solicitors placed him in communication with me." "What was he coming to see you about?" "With reference to this advertisement." I gave the inspector the advertisement which had placed me in the position which, so far, did not promise to be much to my advantage. "What is your name?" "James Southam." "Are you the James Southam here alluded to?"