Jay was first to go over the side of the _Nemo_. The sea had looked calm and placid as a mountain lake as he started and he figured no difficulty in getting about over the bottom. But, as every diver knows, the sea is the most deceptive thing in the world. Stand on the shore on a quiet day and look out to sea over waters unruffled save for the roll of the surf. Everything lovely; yet, down deep, mighty forces heaving and tossing like a hidden monster seeking some prey to devour. From hummock to hummock the young diver was tumbled over the submarine sandbars. First he would be knocked down and then as quickly stood up once more. At intervals he would be lifted off his feet and swirled along in the vortex of a deadly current. Then he would be slammed down hard again and pinned with such force against the ocean bed that it seemed he never would get to his feet again. Occasionally he found himself sprawled out on hands and knees like a creeping crustacean. Under such circumstances search for the U-boat was next to impossible. Instead of the usual green radiance of the water Jay found himself in a deadly saffron light, at times almost opaque. Experience had taught him that that meant the sand was in motion. Light conditions, therefore, were not favorable for exploration, since the youth could not see very far in any direction. Peer about as he did between his many enforced flip-flops, he saw nothing of the U-boat, even though the navy men had said it was in these very waters and within a very narrow prescribed circle. Presently, as he was swept helter-skelter along over the sand hummocks by the twisting waters, he brought up sharp against some object that projected out of the sand like a slim piling. Instinctively he flung out an arm as he was swept close to it. His arm struck with such a resounding whack that for the moment the limb felt numb. "What in the name of sense is this?" he speculated, unable to see for a moment because of the swirling sand. His mind conjectured all manner of things. Clinging tenaciously to his new-found support, Jay ran his hands up and down the protuberance. It was smooth and round like some cylindrical metal object. But what was it? Soon there came a rift in the cloud of sand particles and the filtered sun's rays came down through the opulent green. In that moment Jay cleared the sand from the eyes of his helmet that he might scrutinize the object more clearly. Turning his gaze upward, he beheld the boxed lens glass of a periscope--the eye of the submarine! "Great guns! here's the old U-boat buried to her eyelashes in the bottom of the sea!" ejaculated the diver, surprised and stunned at his discovery. There was no doubt of it; here was the periscopic pole of a submarine with its great eyes still intact. But what of the U-boat itself? Was it there under the sandy floor of the ocean? And by what queer prank of the tides had it come to be covered over?