"Nobody knows he is owner. And it pays twelve per cent," said the Italian mildly. He paused at the door. "Do we go in?" he asked.

An acrid-soft odor as of primordial slime subtly intruded upon the sensory nerves of the visitor. The place breathed out decay; the decay of humanity, of cleanliness, of the honest decencies of life turned foul. Something lethal exhaled from that dim doorway. There was a stab of pestilence, reaching for the brain. But the old charlatan was no coward.

"Show me the cases," he said.

For an hour he moved through the black, stenchful passageways, up and down ramshackle stairs, from human warren to human warren, pausing here to question, there to peer and sniff and poke with an exploring cane. Out on the street again he drew full, heaving breath.

"O'Farrell's got to clean up. That's all there is to that," he said decisively.

"The Doctor thinks?" queried the little physician.

Dr. Surtaine shook his head. "I don't know. But I'm sure of one thing. There's three of them ought to be gotten out at once. The third-floor woman, and that brother and sister in the basement."

"And the German family at the top?"

Dr. Surtaine tapped his chest significantly. "Sure to be plenty of that in this kind of hole. Nothing to do but let 'em die." He did not mention that he had left a twenty-dollar bill and a word of cheer with the gasping consumptive and his wife. Outside of the line of business Dr. Surtaine's charities were silent. "How many of the other cases have you had here?"

"Eleven. Seven deaths. Four I take away."