All went well for a moment, a moment that seemed an age, and he had reached a point half-way to the door, when his hand slipped on the wet boards with a noise, faint but distinct. He stopped short, his hair stirring with fright.

“S—sh!” One of the men scrambled to his feet.

“What’s the matter?” growled the other.

“I heard somethin’—over there.”

“A frog, likely, you fool; got a match?”

Satterlee 2d was desperate. He was lost unless he could reach the doorway first. He started forward again with less caution, and one knee struck the floor sharply. A light flared out, and for a moment he stared across the pool into two pairs of wide-open, gleaming eyes. Then the match dropped into the water with a tiny hiss, and Satterlee 2d leaped for the door. The streak of light was now but a scant two yards distant. Near at hand sounded feet on the planking, and from the pool came a splashing as one of the men rushed through the water. Then a hand grasped the boy’s bare ankle. With a shriek he sprang forward, the grasp was gone, and from behind him as he fled stumbling up the steps came the sound of a heavy fall and a cry of triumph.

“I’ve got him!”

“You’ve got me, you fool! Let go!”

The next instant Satterlee 2d was through the doorway, had slammed the portal behind him, and had shot the big iron bolt despairingly. With closed eyes he leaned faint and panting against the oak while blow after blow was rained on it from within and hoarse oaths told of the terror of the prisoners. But the stout door showed no signs of yielding, and Satterlee 2d opened his eyes and looked about him. The night was cloudy, but the school-buildings were discernible scarce a stone-throw away.