that hour was gone, Chenowich, in response to a sizzling phone call, skidded a department car to a stop at the curb a block from the building. He delivered a dictograph to his superior, listened to a grim warning to keep his mouth shut about this at Headquarters, asked a couple of questions that drew no answers, and departed as swiftly as he had come.

The next step was the dangerous one. The superintendent admitted Kirk to the Dakin apartment and went down to the foyer to ring the bell in case the girl arrived at the wrong time. He soothed the Lieutenant's anxiety somewhat by explaining that she seldom returned to the place before seven o'clock, over three hours from now, but Kirk was taking no chances.

By five o'clock he had Alma Kirk's bedroom bugged and the instrument in working order and thoroughly tested. He was painstaking about removing all traces of plaster and sawdust and bits of wires before pushing the dresser back into place to cover the dictograph's receiver.

He found the superintendent stiffly on guard in the foyer and gave him his final instructions. The man listened respectfully, repeated them back to Kirk to convince him there would be no slip-up, and the Lieutenant went back upstairs to 3D to take up his vigil.

He was in the spinster's bedroom, working out a crossword puzzle, earphones in place, when he heard the sound of the bedroom door closing in the next apartment.

The time was 7:18.

Chapter VI

It was like being in her room with his eyes shut. The soft scraping of drawers opening and closing, the creak of a chair being sat in, the cushioned thump of shoes dropped to the carpeted floor, even the rustle of a nylon slip as she drew it over her head.

It seemed much too early for her to turn in for the night. Was he going to be forced to sit there and listen to twelve of fourteen hours of feminine snoring? It would be damned unlikely in view of what was a cinch to be running through her mind.

Minutes later he heard her leave the bedroom, followed at once by the muted roar of a running shower. After that had lasted a normal length of time, the sound ceased and naked feet were audible on the bedroom rug. There was more opening and closing of drawers, the whisper of clothing being donned, and an irregular clicking sound like tapping glass against glass which he finally interpreted as part of the ritual of alternately combing and brushing hair while in 

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