"If we are in the Golden Horn, yes," admitted Huxtable. "But are we? All we can do is to wait until just after sunset, and then take a quick look round. The place seems too jolly quiet for Constantinople. I haven't heard the thud of an engine since we dropped the steamer, or the steamer dropped us--whichever way you like to take it." In order to make doubly certain that there was no maritime traffic in the vicinity, the Lieutenant-Commander enjoined silence for the space of five minutes. With his ear against the concave side of the submarine's hull he waited and listened intently. Not a sound was to be heard, for already the British craft's motors had been switched off, and she was now lying motionless in ten fathoms on the bed of the sea. Slowly the hours passed until the time of sunset drew near, then once more the crew were called to their stations. As coolly as if engaged in evolutions in the piping times of peace the Lieutenant-Commander gave his orders. "Charge firing-tank; flood torpedo-tubes; stand by." The men at the torpedo-tubes obeyed with alacrity, yet wonderingly, for the sanguineness of their young skipper in ordering the torpedoes to be placed in the tubes before he was even certain that an enemy was in sight puzzled them. Moving very slowly ahead, the submarine rose till her periscope just showed above the surface. Even Huxtable in his most optimistic mood did not expect the sight which met his gaze as he looked at the dazzling object-bowl of the periscope. There, clearly depicted, was a large cruiser flying the Turkish flag. She was within two hundred yards of the submarine, and at about a like distance from the northern shore of a broad creek. The cruiser was not in a position of defence. Her sun awnings were still rigged, her torpedo-nets not out; even her fo'c'sle and quarter-deck guns were trained fore and aft, and still had their tompions in the muzzles. Nor were there any signs that she had steam up. "All clear, sir!" reported Sub-lieutenant Devereux, who, stationed at the supplementary periscope, had swept the limited horizon to certain that no hostile destroyer or patrol-boat in the vicinity. "Both tubes--fire!" ordered the Lieutenant-Commander. He made no attempt to dive as the two missiles left their tubes. He had sufficient reason to believe that the Turks would be too panic-stricken to attempt to fire at their assailant. To his satisfaction he noted, as he watched the diverging white line of foam that marked the of the torpedoes, that both weapons were heading straight for the mark with a velocity almost approaching that of an express train. A Turkish seaman on the fo'c'sle, gazing idly at the water, was the first of the crew of the warship to notice the impending danger. Even then he did not realize the situation, for the possibility of a torpedo fired from a submarine in strongly-guarded waters never occurred to him until the missiles were almost home.