"That's where things of importance are carried," said Larry significantly, "things that if they was lost might hamper the troops in France, things what Uncle Sam's been hard at work makin' so as to down the Kaiser; now if——"

All three looked in succession at one another, their suspicions clearly written on their faces.

"If," said Bill at last, "he wanted—this fellow we've caught a sight of—to break up the ship to sink the cargo—well, isn't he the sort of man that would slink about and not want to be seen, and disappear when there was a hail from the bridge? Should he look sideways at everyone and want to keep himself to himself? As to whether he's one of the crew or not, who knows?"

Finally they came to the conclusion that no one could guess, and that positive evidence was required before they could proceed further with the matter.

"Only," said Jim in his quiet reflective way, "it's up to us to give a hint to the old man. Supposing now we set a watch and the fellow eludes us and really does a mischief, who'd be blamed? Who'd blame themselves most? You would Larry—you and I and Bill."

"But supposing it's a mare's nest, what about it?" asked Larry, pulling hard at his cigar. "The old man would point at us, the officers would smile, the men would smirk and have a few things to say that wasn't altogether complimentary. I'm a quiet sort of chap I am, Jim, but when fellers gets sarcastic it gets my goat up. I can stand fun—lots of it—skylarkin' don't come amiss to me nor to Bill either, and I dare say you can enjoy a little of it; but downright contempt, nasty sort of sarcasm, that gets me every time, and I find myself fingering my gun, that is, I should if I carried one, which I don't now, seeing it's against the rules of shipboard."

In the end they approached Tom, the huge sailor who had befriended them in getting their berths on board the ship, and with his approval took the first opportunity of having a clandestine meeting with the Skipper.

"You've done quite rightly," the latter told them. "This may be a mare's nest, as Larry here says. In that case it doesn't go any further, not another man aboard the ship will know; though, as a matter of precaution, I shall tell my officers. They have all sailed with me for years and I can vouch for their honesty and patriotism, they are either British or American to the backbone—and that's something in these days."

"Guess it is," Larry ejaculated. "Well then?"