“Maybe I was imagining,” he said. “It did look as if something was moving — something like a shadow—”
He strolled along the street and passed a light. A few yards farther on he stopped and turned as though remembering something.
His eyes were upon the glare beneath the light. There, he detected a peculiar shadow — it seemed almost to resemble the silhouette of a man.
There was a grim smile on Zull’s face as he continued his way slowly along the street. He stopped at a little alleyway that led between two buildings. There he paused thoughtfully. He could see the outline of the top of a wall twenty feet within the alley.
The place was a cul-de-sac — a veritable trap with its only outlet to the street. Inspector Zull strolled onward. Again he stopped.
This time, he turned and began to retrace his steps.
His scheme was well planned and well timed. The shrewd detective inspector was sure that he was being followed. If so, the man who had been behind him in the darkness should be close to the little blind alleyway.
It would be the logical place for the follower to hide. Zull grinned as he realized that the trap was set.
He proceeded carefully until he reached the corner of the cul-de-sac. There he paused and brought two objects from his pockets a flashlight and an automatic.
PEERING around the edge of the wall, the inspector turned the rays of his torch into the little alleyway. They revealed a short, narrow, stone court, with a brick wall at the end.