Mark was silent as he strained his eyes over the surface of the sea, looking vainly for the struggling figure which had been making so brave a fight for life. There was a terrible feeling of dread oppressing him, as for the first time he was face to face with death; and in those awful moments he was unconscious of the regular reports of the guns as the _Nautilus_ kept up her fire at the flying schooner. He heard nothing, saw nothing but the sea shimmering in the moonbeams. For after a long and desperate fight, with the water rising higher about his lips, the unfortunate black had grown weaker and weaker, and at last had given one tremendous plunge, which raised him high, so that he could glare wildly round for help; then he had ceased his struggle and gone slowly down, the water closing over his staring eyes and glistening teeth; there were a few bubbles, and the sea heaved and fell gently over the spot where he sank. "I have been close here, sir," cried the coxswain. "Easy, my lads," cried the young lieutenant in command. "Can't you see him, Van? Oh, hang it, lad, look! We mustn't let the poor beggar drown, even if he is a nigger." Mark uttered a groan. He had come to save a human being--a fellow-creature cast to destruction by the brutal captain of the slaver--and he had failed. "Got him?" came faintly from the distant ship. "No, sir," shouted the second lieutenant, through his hands. "Oh, look! look!" cried Mark, wildly. "Pull, my lads. Starboard men, back water. He must be somewhere here. He is sure to come up again." The men obeyed, and in those terrible moments the silence was appalling. Then came the deafening roar of a gun--the last fired then at the now distant schooner--and Mark sank down from the thwart and was turning away from the men to hide his drawn face, when he uttered a wild cry, flung himself half over the side of the boat, and made a desperate clutch at something which just rose above the water. Then hand grasped hand, the white holding the black in a desperate clutch, as the lieutenant dropped the rudder-lines, and saved Mark from going overboard by seizing him round the waist. Then came a little hauling, followed by a cheer, as the nude figure of a stalwart black was dragged in, to sink helpless, perfectly insensible, in the bottom of the boat. "Now pull, my lads!" shouted the lieutenant; "pull all you know, and let's get aboard. We've got to take that schooner before we've done."