Protesting, John was left upon the bank, while Stan plunged in and swam slowly and carefully out into the cove. John watched the faint ripples of Stan’s progress for several minutes. Fifteen minutes went by, during which time he lost track of his friend against the dark water of the cove, then he heard a loud outcry from the men upon the barge, saw a rowboat push away, and knew that Stan had been discovered!

With fast beating heart, John Tallman stared through the binoculars as the boat rowed hard, then slowed. That would mean that Stan had gone underwater trying to elude his pursuers! Suddenly the shout went up again and the boat darted off in a new direction. This time there was a struggling at the end of the row and John knew Stan had been captured! What could he do to help his chum? He did not know, but an idea came to him and he did not hesitate to act upon it. Undoubtedly they would take Stan to the cabin. So John did not wait to see that done. Instead, he darted up the trail, raced pell-mell along the ridge of the Island for the sloop! It would not have mattered if it were ten miles to go instead of two! He had to get there and come back!

In the meantime Stanley Sandborn sat huddled and cold in the bottom of a boat while he was rowed to the barge. There he was hauled dripping to the deck and stood up in the middle of a group of hard faced men. One of them was Mr. Nevens!

“Well, my boy, and what are you doing, snooping round here?” inquired Mr. Nevens.

Stan did not know what to say. If, by any chance, Mr. Nevens were a law-abiding citizen and minding his own business, Stan was then a stupid trespasser! And if he were really a criminal, Stan’s remarks could not release the youth. The boy held his tongue and made no reply.

“Take him to the house, Dago,” ordered Mr. Nevens, “and stick him in room 8.”

Dago grabbed the youth by the nape of the neck with evident delight at his opportunity, and half flung, half pushed him into another boat. Then he pushed off and began rowing ashore with his captive. But he had not reckoned with Stan’s brains!

They had hardly got halfway to the boat-house when Stan pointed ahead. “Look, Dago!” he said, as if surprised.

Obligingly, Dago turned to glance over his shoulder. There was nothing unusual there. The big yacht had gone, and no lights showed. He turned back, angrily—and his eyes popped! Stan had disappeared.

Sick at the thought of what Mr. Nevens would say, and do, Dago rowed in frantic circles trying to find his escaped prisoner! When Stan broke water, after a minute of stiff swimming, he came up yards from the circling boat.