The cab shot away from the curb and headed for the lights of Seventh Avenue.

“Someone been knockin’ you around?” the cab driver asked curiously.

“Naw!” Fenner grunted. “My Aunt Fanny likes to keep an edge on her teeth.”

“A tough old lady, huh?” the driver said, but after that he shut up.

It was almost dark by the time they crossed Brooklyn Bridge. Fenner paid the cab off and went into the nearest bar. He ordered a club sandwich and three fingers of rye. While he bolted the sandwich he got the girl who waited on him to find out where the address was. She took a lot of trouble, finding it on a map for him. He paid his bill, had another short rye, and went out again.

Ten minutes’ quick walking got him there. He found his way without asking and without making a mistake. He walked down the street, looking closely at every shadow. The house he wanted was on the corner. It was a small two-story affair, with a square box hedge so arranged that it masked the front door completely. There were no lights showing in any of the windows. Fenner pushed open the gate and walked up the slightly inclining path. His eyes searched the black windows for any sign of movement. He didn’t stop at the front door, but went on round the back of the house. There were no lights there. He found a window that was open a few inches at the top, and he shone his small torch into the room. It was empty of everything. He could see the dust on the floor boards. It took him a few seconds to raise the window and step into the room. He was careful not to make any noise, and he trod on the boards tenderly.

Quietly he tried the door, pulled it open and stepped into a small hall. The light of his torch picked out a carpet and a large hall cupboard. The stairs faced him. He stood listening, but no sound came to him except the faint hum of distant street traffic.

He went up the stairs, the .38 in his hand. His mouth was drawn down a little at the corners, and the muscles of his face were tense. On the landing he paused again, listening. He was conscious of a strange unpleasant smell that was vaguely familiar to him. He wrinkled his nose, wondering what it could be.

There were three doors facing him. He chose the centre one. He turned the handle softly and edged the door open. The smell came to him stronger now. It reminded him of the smell from a butcher’s shop. When he got the door half open, he paused and listened, then he stepped in and pushed the door to behind him. His torch lit up the light switch and he snapped it on.

He looked round the well-furnished bedroom, his finger itching on his gun trigger. There was no one there. He turned and twisted the key in the lock. He wasn’t taking chances. Then he wandered round the room thoughtfully.