Apparently the commander of the ship agreed with him, for he made no immediate answer. For several moments he remained in meditative silence, his brow wrinkled, as though he was turning the whole thing over and over in his mind.
"From the very fact that he wore such a garment," the captain said at last, "it would seem that this man is among the regularly enlisted men on this ship. However, that is by no means certain. There is this certainty, however: If he would go to such desperate lengths once, there is every possibility that he will do so again—only more cautiously than before, for now he knows that his presence on board is known.
"The most rigid investigation must be started at once, and for that, Lieutenant, I will require your assistance. Leave these young men in charge of the wireless room, unless something unusual or in the nature of an emergency occurs.
"As for you gentlemen," he continued, turning toward the three boys from Brighton, "you are commanded not to mention a single word about this whole occurrence to another soul. If any one should question you, with a seeming knowledge of what happened here to-night, report the matter to me at once."
"Yes, sir," the three boys responded, saluting, and the captain departed, motioning Lieutenant Mackinson to accompany him.
By this time Joe was stiff and sore in every joint. Jerry and Slim insisted that he retire immediately, and helped him off with his clothing.
Nor was there any objection from Jerry, whose turn in the wireless room was to begin then and last until one o'clock in the morning, when Slim suggested that he would stay on with him, "just to talk things over."
"All right," said Jerry, "and then I'll stay on during your shift, until Joe relieves us in the morning. We can get a good sleep to-morrow, anyway."
And so the long night began. The dull song of the engines, far, far below, became like the monotonous droning of giant bees, and the wash of the salt water against the side of the ship was a constantly recurring swash-h-h—swish—swash-h-h—swish as the vessel plowed on and on through the darkness, toward the submarine zone and Europe and the battlefields and the trenches and the men—millions of them—of the Allied armies.
It was near midnight, and the boys had fallen silent, Jerry with the wireless headpiece over his ears, Slim standing near the porthole, gazing out at the lone swaying light that indicated the position and the progress of the cruiser convoy on the port side.