Striking out vigorously he gained the spot where Gwennap had sunk just as the man appeared for the second time. Bearing in mind the instructions laid down in official directions for saving life Hythe used a fair amount of precious breath in bawling in a loud voice that the drowning man was safe. Gripping Gwennap by the collar he jerked him on to his back, the man struggling furiously the while. Hythe, realizing that once the frantic and powerful fellow gripped him, it would be "all up," had his work cut out to avoid the man’s arms. One glance showed him that the "Aphrodite" was drifting fairly fast to leeward; his assurance that the drowning man was safe seemed a hollow mockery. "Don’t struggle, you idiot!" spluttered Hythe, as the crest of a wave broke over his head. "Don’t you see you’ll do for the pair of us?" But Gwennap evidently did not see, for if anything he struggled the more. The sub came to the conclusion that the situation was a desperate one. He was rapidly becoming weaker; his clothes, now thoroughly waterlogged, seemed like leaden weights. He had lost all sense of direction; he knew not where the "Aphrodite" lay. It seemed as if he were left with a frantic, drowning man in the lone sea. But not for one moment did Hythe intend to abandon the man he had so gallantly attempted to rescue. If only he could prevail on Gwennap to keep fairly still a chance yet remained; but the man showed no signs of ceasing to struggle. "Let go!" shouted Hythe, as loudly as he could, as Gwennap’s huge fist seized him by the shoulder, followed by an iron grip on his coat-sleeve. In his effort to shake himself clear the sub sank. As he did so Gwennap’s grip became a close embrace. Down, down, down; it seemed as if Hythe had sunk a full twenty feet ere the downward motion ceased. His lungs seemed ready to burst with the pressure. Even if he would he could not now free himself from the relentless grasp. Once more his head appeared above the surface. He drew in a deep, reviving draught of air, even though it was salt-laden; then with a sudden effort he wrenched his right arm clear, drew back his fist, and planted a tremendous blow upon Gwennap’s temple, and his struggles ceasing he was now practically harmless. "Pity I didn’t think of that before," thought Hythe dimly. "I wonder if I’ve killed him, but there was no other way." "Cheer up, Hythe!" exclaimed a hearty voice that the sub recognized as Devoran’s. Turning his head the well-nigh exhausted rescuer saw close to him the chief officer and O’Shaunessey, who, having divested themselves of the greater portion of their clothing, had dived overboard to aid their comrades. "That’s right, you hang on to me," continued Devoran, "O’ Shaunessey will look after that lubber. The captain will give him a dressing-down when we get aboard again." Hythe was too done up to inquire why Gwennap should be reprimanded. He was only too glad to rest his hand upon Devoran’s brawny shoulder.