with old-fashioned slanting doors. He reconnoitred this warily. A bright light was shining from a window in this alley. He crept below it on hands and knees fearing to look in until he had investigated a little. He found that one flap of the cellar door was open, and poked his nose into the aperture. All was dark below, but a strong, damp stench of paints and chemicals arose. He sniffed gingerly. "I suppose he stores drugs down there," he thought.
Very carefully he crawled back, on hands and knees, toward the lighted window. Lifting his head a few inches at a time, finally he got his eyes above the level of the sill. To his disappointment he found the lower half of the window frosted. As he knelt there, a pipe set in the wall suddenly vomited liquid which gushed out upon his knees. He sniffed it, and again smelled a strong aroma of acids. With great care, leaning against the brick wall of the house, he rose to his feet and peeped through the upper half of the pane.
It seemed to be the room where prescriptions were compounded. As it was empty, he allowed himself a hasty survey. All manner of bottles were ranged along the walls; there was a high counter with scales, a desk, and a sink. At the back he could see the bamboo curtain which he remembered having noticed from the shop. The
