“Hello! Police headquarters?” he asked. “This is Roger Verbeck speaking. Hurry up here! I’ve just caught the Black Star trying to loot my rooms. My old address—yes!”

And while he spoke he opened the door, so that his voice would drown any squeak the hinges might give; and then he slipped into the hall and hurried to the front stairs. He dashed down the three flights four steps at a time.

The prisoner had tugged desperately at his bonds and had felt them give. With sudden hope, he had worked furiously to get free. He was through the window and descending the fire escape as Verbeck finished the imaginary telephone message to the police, exulting at what he fondly thought had been his close escape.

[CHAPTER II—THE BLACK STAR]

Verbeck found Muggs at the corner of the apartment house, standing in the shadows and trying to shield himself from the stinging sleet and biting cold wind.

“He’s just reaching the ground, boss,” Muggs said. “See him?”

“I see him. Be careful now, Muggs; we don’t want to lose him. Thanks for understanding and loosening his bonds. There he goes!”

The erstwhile prisoner had reached the ground and was darting through the shadows toward the alley. Down this he ran for half a block, then crept between two buildings, and so reached the boulevard near a corner, with Verbeck and Muggs a hundred feet behind him. It was difficult trailing the man through a storm of sleet and fine snow, but Verbeck and Muggs had trailed men before, sometimes for amusement, and at other times through necessity.

The man hesitated at the curb a moment, then struck across the driveway. Verbeck and Muggs followed. They took opposite sides of the walk and slipped along over the frozen ground, darting from shadow to shadow, always watching the elusive shadow ahead. At the street crossings their quarry walked across boldly, and they could not follow instantly for fear of being detected, but they always picked up their man again, once they were across.

Thus they covered a dozen blocks, and it appeared that the midnight prowler considered himself safe now. He hurried down a cross street, his head bent forward against the cold wind that swept up the hill. Block after block Muggs trailed him, while Verbeck shadowed from the other side of the street, dodging into dark doorways now and then when he expected his man to look behind.