might offer a suggestion, probably espied the tweezers on the lady's dressing-table—no lady nowadays is without these little eyebrow-pluckers, don't y' know—and immediately his problem was solved. It remained only to test the device. Before departing, however, he chiselled open the jewel-case which the other chap had merely dinted, and found the solitaire diamond ring that he later attempted to pawn. Then he erased, as he thought, all his finger-prints, forgetting to wipe off the inside door-knob of the closet, and overlooking the hand-mark on the table. After that, he let himself out quietly, and rebolted the side door the same as I did, stuffing the tweezers in his waistcoat pocket and forgetting them."
Heath nodded his head oracularly.
"A crook, no matter how clever he is, always overlooks something."
"Why single out crooks for your criticism, Sergeant?" asked Vance lazily. "Do you know of anybody in this imperfect world who doesn't always overlook something?" He gave Heath a benignant smile. "Even the police, don't y' know, overlooked the tweezers."
Heath grunted. His cigar had gone out, and he relighted it slowly and thoroughly.
"What do you think, Mr. Markham?"
"The situation doesn't become much clearer," was Markham's gloomy comment.
"My theory isn't exactly a blindin' illumination," said Vance. "Yet I wouldn't say that it left things in pristine darkness. There are certain inferences to be drawn from my vagaries. To wit: Skeel either knew or recognized the murderer; and once he had
