With a mighty effort Lord Hastings lifted Davis clear of his feet and, exerting tremendous strength, swung him around. There was a sound of a thud, and Davis' figure dropped limply to the floor. His head had come in contact with the solid wall.

At the same moment Blosberg fired and Lord Hastings felt a stinging sensation in his left shoulder.

He staggered back.

Blosberg took advantage of this and darted out the door just as Frank appeared at the top of the steps. Both raised their revolvers at the same moment, but Blosberg was the first to fire.

Frank's gun seemed to explode in his hand. It leaped in the air like a live thing and the lad felt a strange sensation in his hand. He wiggled his fingers, but now he was unable to tell whether he had a right hand or not. There was no feeling there. Blosberg's bullet had struck the lad's revolver and the shock had numbed the lad's hand.

Before Frank could recover, Blosberg had darted down the hall and turned into a narrow passageway at the end of it, disappearing just in time to escape a bullet from Jack's revolver, the lad appearing on the second floor at that moment.

He dashed after Blosberg.

Turning off the main hall into the narrow passage at the end, Jack brought up sharply against an object in the semi-darkness; but he found no Blosberg. Quickly he took a match from his pocket and struck it. There was no sign of Blosberg, and Jack made out that the object that had interrupted his progress was a ladder leading upward toward the roof.

"He's up on the roof," cried Jack. "Come on."

Without taking thought of what danger might be in store for him above, he mounted the ladder rapidly.