In a moment the Sea Lion lifted to the surface, and Ned lost no time in relieving himself of his helmet. Then, still attired in the rubber suit, he hastened to the conning tower, where he found Jack, glass in hand, sweeping the moonlit sea eagerly. There was a faint haze off to the west, but nothing more. Whatever had passed above the submerged boat, on the surface, had wholly disappeared, though the time had been very short.