"There's something wrong down there!" shouted Tyler, realizing that some terrible misfortune had suddenly and unexpectedly overtaken the naval officers. "Look, sir, they are on their faces, and appear to be insensible!"
He tugged at the sleeve of the senior officer without ceremony, and directed his attention to those below, for the former had been engaged in conversation with the mate, and had not witnessed what had happened.
"Something wrong!" he exclaimed in astonishment. "Why, what could be wrong? Ahoy, there, Troutbeck and Maxwell! Why, they are on their faces, and, as I live, they are insensible!"
His amazement was so great that he stood there dumbfounded, and stared at Tyler as though he could not believe his eyes. But a shout of alarm from the mate quickly aroused him.
"It's the gas!" he cried in shrill anxious tones. "Quick, or they'll be suffocated! Hi, for'ard there! All hands on deck to the rescue!"
He went racing towards the quarters in which the men were enjoying their meal, leaving Tyler and the naval officer alone. As for the latter, his astonishment was still so great that he remained rooted to the spot, leaning over the hatchway, the combing of which he grasped with both hands, whilst he stared down at the two prostrate figures huddled below upon the corn as though the sight was too much for him. Then he suddenly stood erect and screwed his knuckles into his eyes, as though he feared that they were misleading him.
"Gas!" he murmured doubtfully. "What gas? How could there be such a thing down there?" Then, suddenly recollecting the condition of his juniors, and realizing that they were in the gravest danger, he sprang towards the ladder which led to the hold below, and commenced to descend it as rapidly as possible.
But Tyler was before him, for though dumbfounded at first at what was beyond his comprehension, the shout to which the mate had given vent had instantly caused him to understand the danger of the situation. There was gas in the hold, some poisonous vapour unseen by those who entered through the hatchway, but lying there floating over the corn ready to attack any who might enter into the trap. What should he do? The question flashed through his mind like lightning, and as quickly the answer came.
"We must get them out of it," he shouted hoarsely, "and by the quickest way too. Hi, there, get hold of the winch and lower away!"
As in the case of the officer who had stood beside him, his first thought had been to rush for the ladder, and to descend to the hatch below by that means. But a quick glance at the figures lying half-buried in the corn, and an instant's reflection, told him that rescue would be difficult, if not impossible, in that way. For, supposing he leapt from the lowest rung on to the cargo of grain, could he hope to be able to lift one of the victims and carry him up the steep ladder which led to safety? Such an attempt would require more than double the strength which he possessed, and besides there was the deadly gas to be reckoned with. Like a flash the thoughts swept through his brain, for Tyler was a sharp young fellow, and ere another moment had passed his plan for rescue was formed. Pointing to the winch, from which a stout rope ran through a block attached to the boom above, and from thence dangled down into the hold, he called to the mate, who now came running along the deck with three of the hands, to get hold of the levers and prepare to work upon them. Then, tearing his handkerchief from his pocket, he hastily tied it round his face, fastening the knot behind his head as tightly as possible, so that the thickest folds came across his mouth and nostrils. A moment later he had grasped the rope which hung at one side of the hatchway, and at once passed it around his waist. A rapid hitch which his father had taught him secured it there, and a moment later he had thrust himself over the hatchway and was swinging in mid-air.