"He hasn't gone out," said Frank, confidently, in a low tone. "Try all the lockers."

They started down, one on each side, opening first the doors of closets in which they and their companions had placed their clothes.

Nothing had been disturbed there.

As they went they found nothing but empty lockers, but presently Frank came to one the door of which he could not open.

The handle was simply a knob, and the door was held fast by a Yale lock. He looked at it a moment, then, drawing back, gave the door a terrific kick squarely upon the lock.

The thin wood broke at once, and another kick splintered it from top to bottom.

At that instant a man dashed out, tried to push Frank aside and make for the door. Frank recognized him at once as one of the men he had seen with Higgins at the Hoffman House.

"No, you don't!" he exclaimed hotly, catching the fellow by the arm and giving him a smashing blow on the side of the head.

Hearing the rumpus, Hill came running around the corner just in time to meet the two as they were staggering along. He promptly gave the scoundrel a rattling series of blows that dropped him to the floor half stunned.

"Come in here," called Frank, and the other students came crowding into the room.