"Fools!" answered Astro. "Anybody can enter. You can't keep innocent people out of the house. This man may go in, present a pistol at Gallino's head, get the money, and walk out. Who's to suspect a casual visitor?" He paused a moment to don his street coat. "Gallino may even be chloroformed. We've got to get there at once. Hurry!"
As they hastened along to the cab-stand, McGraw grunted in ill temper, "But who's the man that's after it, I'd like to know?"
He received no answer; nor was a word spoken all the time that they were being driven to Macdougal and Fourth Streets. When they had alighted there, paid their fare, and looked down the dark sidewalk, no one could be observed. Number 950 showed no sign of life. They started to walk briskly toward Gallino's, when suddenly a person emerged from the Italian's doorway and hastened down the steps.
Instantly Astro drew his revolver and shouted to McGraw, "That's the one! Get him!"
At the exclamation, the figure turned on the bottom step, shrank back in surprise, and becoming entangled in the long coat, fell across the balustrade to the stone sidewalk. Instantly, with a frightful roar, a terrific explosion rent the air. Astro and his companions staggered back, and above the crash of falling debris the Master of Mysteries could be heard shouting:
"That's what was meant for Gallino if he hadn't paid to-night!"
Then the three rushed anxiously forward to where the limp figure lay in a distorted knot on the flagging. The clothing had been torn to shreds, and a pool of
