tors. For instance, the galoshes which Snitkin found in Chester's clothes-closet were the exact size of the prints. At first I toyed with the idea that they were the actual instruments of our unknown's vestigial deception. But when, after they had been taken to Headquarters, another set of similar tracks appeared—to wit, the ones found this morning—I amended my theory slightly, and concluded that Chester had owned two pairs of galoshes—one that had perhaps been discarded but not thrown away. That was why I wanted to wait for Captain Jerym's report: I was anxious to learn if the new tracks were exactly like the old ones."
"But even so," interrupted Markham, "your theory that the footprints emanated from the house strikes me as being erected on pretty weak scaffolding. Were there any other indicants?"
"I was coming to them," replied Vance reproachfully. "But you will rush me so. Pretend that I'm a lawyer, and my summation will sound positively breathless."
"I'm more likely to pretend that I'm a presiding judge, and give you sus. per coll."
"Ah, well." Vance sighed and continued. "Let us consider the hypothetical intruder's means of escape after the shooting of Julia and Ada. Sproot came into the upper hall immediately after the shot had been fired in Ada's room; yet he heard nothing—neither footsteps in the hall nor the front door closing. And, Markham old thing, a person in galoshes going down marble steps in the dark is no midsummer zephyr for silence. In the circumstances Sproot would have been certain to hear him making his escape. Therefore, the explanation that sug-
