"I'm very sceptical," I pleaded. "All the better," he said, almost as if to himself. "You have the pluck; I have the knowledge—" "The knowledge?" He looked round cautiously as if to make sure that there was no one within earshot. "I've been in the place myself," he said in a lowered voice, "quite lately—in fact only three nights ago—the day the man turned queer." I stared. "But—I was obliged to come out—" Still I stared. "Quickly," he added significantly. "You've gone into the thing pretty thoroughly," was all I could find to say, for I had almost made up my mind to go with him, and was not sure that I wanted to hear too much beforehand. He nodded. "It's a bore, of course, but I must do everything thoroughly—or not at all." "That's why you clean your own g*n, I suppose?"