closed; he drew the black silk mask from his pocket and slipped it over his face. Immediately in front of him the stairs led upward; immediately to his right was the door into the shop—the modest street entrance was common to both.
The door into the workshop was not locked. He opened it, steped inside, and closed it quietly behind him. The place was in blackness. He stood for a moment silent, straining his ears to catch the slightest sound, reconstructing the plan of his surroundings in his mind as he remembered it. It was a narrow, oblong room, running the entire depth of the building, a very long room, blank walls on either side, a window in the middle of the rear wall that gave on a back yard, and from the back yard there was access to the lane; also, as he remembered the place, it was a riot of disorder, with workbenches and odds and ends strewn without system or reason in every direction—one had need of care to negotiate it in the dark. He took his flashlight from his pocket, and, preliminary to a more intimate acquaintance with the interior, glanced out through the front window near which he stood—and, with a suppressed cry, shrank back instinctively against the wall.
Two men were crossing the street, heading directly for the shop door. The arc lamp lighted up their faces. It was Inspector Lannigan of headquarters and Whitey Mack! The quick intake of Jimmie Dale breath was sucked through clenched teeth. They were close on his heels then—far closer than he had imagined. It would take Whitey Mack scarcly any longer to open that front door than it had taken him. Close on his heels! His face was rigid. He could hear them now at the door. The flashlight in his hand winked down the length of the room. It was a dangerous thing to do, but it was still more dangerous to stumble into some object and make a noise. He darted forward, circuiting a workbench, a stool, a small hand forge. Again the flashlight gleamed. Against the side wall, near the rear, was another workbench, with a sort of coarse canvas curtain hanging part way down in front of it, evidently to protect such things as might be stored away beneath it from
