I threw my whole hand into the center of the table, staking everything on it.
"I'm the Manchester Slasher," I said.
He recoiled. His brown face, incapable of turning pale, nonetheless gave the effect of blanching in some mysterious manner of its own. The common little thief and garden-variety mugger quailed before the celebrated Mad Ghoul of Manchester. He drew out a large clasp knife and snapped open the blade, his hand shaking. "'Ere, now, you keep back from me, you 'ear? I'm not to be trifled wiff, see? You touch me and you're a deader, that's wot."
"Oh, put it away," I said fiercely. When he refused, I grabbed his wrist with my left hand and struck it a stinging judo blow with my right: the knife fell.
"Ow-er!" he yelled. "You keep back!" Cowering, he gazed at me with those muddy-crimson eyes wide, his mouth stretched in a nervous, sickly grimace of fear. "Twenty you done in, all in a couple of dyes," he whispered. "And I been and gone and drunk wiff you lyke you was my brother. You're mad-dorg crazy, you are."
"I'm as sane as you are," I said, "or saner. For heaven's sake, man, get hold of yourself. Do you think I stood you a bucket of gin and wasted two hours on you just to murder you in my own room?"
"Welp, no," he said grudgingly.
"Up north I killed four in the time I've taken to talk to you," I said, to impress him further. "Now listen closely, because I don't want to go over this more than a couple of times. In the first place, those people I killed weren't people."
"Garn!"