But the first faint gray streaks were hardly painting the eastern sky when Jerry and Slim, unable to sleep longer, came out upon deck to take for themselves a general survey of the danger zone. "What's that?" cried Slim suddenly, staring off over the stern of the _Everett_. "Smoke!" echoed Jerry, excitedly. "Yes, smoke from the stack of the destroyer," said Joe, who had come up behind them without being heard. "We just got her signal a moment ago." "How far do you suppose she is away?" asked Slim. They were speculating upon the distance between the two vessels, when Slim, speechless for the moment, pointed to what seemed to be little more than a dark speck on the water about a mile astern and to the west of them--for at that time their zig-zag course pointed them almost due north. "Submarine approaching astern!" sang out the man in the crow's nest. It was as though the startling message had been megaphoned to every man aboard the _Everett_. At the same time the cruiser of the fleet began maneuvering herself between where the periscope showed the submarine to be and the transport itself. Almost simultaneously the U-boat came to the surface and one of the big guns on the cruiser belched forth a shell that apparently fell a short distance the other side of the submarine. The U-boat itself let loose a shot, and with such accuracy that only the sudden maneuver of the transport at that instant saved it from being hit. By this time the decks of the _Everett_ were crowded with the khaki-clad soldiers of Uncle Sam whom the Germans were trying to prevent from getting into the trenches by sending them to the bottom of the Atlantic. The cruiser had headed straight for the U-boat, while the destroyer was coming up behind it with even greater speed. For some reason that never will be known the commander of the submarine had ignored the destroyer entirely, although it was difficult to imagine that he had not seen it. The general supposition later aboard the _Everett_ was that something had happened to his batteries and he was unable to submerge. "Hurrah!" shouted hundreds of men on the _Everett_ in unison as the torpedo-boat destroyer opened fire. And the aim of her gunners was deadly! for just as the U-boat began to submerge, one of the big projectiles from the destroyer hit her squarely amidships. There was a terrific explosion, the stern of the undersea craft was lifted upward, clear of the water, she stuck her nose into the briny deep, and without another second's delay, dove to the bottom, a wreck. As the tremendous pressure of the water crushed in her air tanks, great bubbles rose to the surface and broke, causing rippling waves to roll outward in increasingly large circles. Then a flood of oil came to the surface of the sea, and the final evidence of the tragedy was obliterated. CHAPTER X FRANCE AT LAST