"Lower away!" he shouted, "and when you see me pass the loop round one of them, hoist as fast as you can. Now, let her go!"

Grasping the length of rope which dangled beneath him, and which he had been careful to leave, he tied it into a strong loop as the men above lowered him into the hold. Then, holding it in both hands, he awaited the moment when he should alight upon the corn. Ah! He was there, and his feet were already sunk ankle-deep in the cargo. Then he became aware of the fact that, though perfectly clear, the atmosphere was stifling. He felt as though he were choking, for in spite of the thick handkerchief about his face the biting gas seemed to fly into his lungs, and at once set him coughing violently. But, determined not to be beaten, he overcame the spasm, and, carefully holding his breath, moved towards one of the prostrate figures.

It was no easy matter to pass the loop around the helpless man, but Tyler worked vigorously at the task. Placing the coil of rope upon the corn close to the feet of one of the officers, he held it there with one toe, and at once grasped the man by the ankles. A lusty heave brought him sliding along through the grain, and scarcely three seconds had passed before the loop was about his body and securely fastened beneath his arms.

"Hoist!" he endeavoured to shout, but his muffled face and the choking gas deadened the words. But for all that, his wishes were clear to those above, who stood staring over the hatchway, for Tyler stood erect and waved eagerly to them. There was a shout, the rope tautened, and then at first slowly, and afterwards with a rush which showed that willing hands were at the winch, Tyler and the officer for whose rescue he had so gallantly descended were hoisted out of the hold. With a swing the boom was brought towards the side, a couple of men rushed at the dangling figures, and ere the naval officer who witnessed the scene had time to give the hoarse command, "Lower away!" the two were lying upon the deck, while the mate of the freight-ship was eagerly removing the loop from the figure of the unconscious officer. As for Tyler, he sat for a short space as if dazed, while he gasped and struggled for his breath. But the knowledge that one victim still remained below, that a second life was at stake, roused him to energy. With a shiver which he could not suppress in spite of every effort, he struggled to his feet and dashed at the hatchway.

"Lower again!" he managed to call out between the paroxysms of coughing which shook him. "Now, let go!"

There was no doubt that the real danger, the urgency of the situation, was impressed upon all who were helping in the rescue; and it did not need the frantic gestures and husky words of command of the elderly naval officer to stimulate the hands to rapid action. By now, too, some fifteen men had assembled, and while a few promptly carried the unconscious officer aside, and set about to restore his animation, the remainder at once leapt to the winch, and set the handles whirling round at such a pace that the rope and its burden were swiftly at their destination. At the same instant the American mate swung himself on to the ladder and went swarming down till he reached the deck below, where he remained ready to lend assistance should he be called for. And well was it that he did so, for that stifling gas well-nigh overcame Tyler in his work of rescue. Holding his breath as he had done before, the latter dashed towards the second prostrate figure once he had obtained a foothold. Then, following the same tactics, he placed the loop in position and grasped the man by his ankles.

"Heave! Pull ho!" As if the words would help the gallant young fellow below, the anxious watchers above gave vent to them, their shouts increasing almost to shrieks of encouragement in their eagerness. "Heave! He's almost through. Once more, and you will have him in position. Ah! he's down!"

A feeling of consternation and dismay suddenly silenced the voices, and a crowd of eager, anxious faces hung over the hatchway, while a couple of volunteers sprang at the ladder.

"Stand aside!" shouted one of them huskily, a big, raw-boned American sailor. "The lad's down, and we're not the boys to stand here looking on and see him die. Say, maties, pitch me the end of the rope, and I'll go in for him!"

Swiftly descending the ladder, he had almost reached the deck below, and was looking eagerly about him for the expected rope, when another voice reached the ears of the onlookers.