"Ida White. Living at Brixton. The drawing-rooms. Quite a swell in her way, sir."
"Is she living alone?"
"So far as we can make out. There are two men now on the watch, one to relieve the other."
"And Mr. Eustace Rutland?" I asked.
"Haven't got track of him yet, sir. The week is rather against us."
"What do you mean by that?"
"Why, sir, you don't forget that it is Derby week, do you? I suppose you backed one, but I can give you the straight tip if you want it."
"I backed Paradox for a couple of sovereigns," I said. (Where is the man who does not take an interest in the Derby?)
"Not in it, sir. There is only one horse will win, and that is Melton."
"But," I said, coming back to the all-engrossing subject I was engaged upon, "what difference will the Derby week make to you?"