“Jolly decent of the old chap,” said Grantham. “I like a man who doesn’t talk much, but is ready to take his share; and somehow, you don’t expect it from a lazy-looking, comfortable business man of his type.”

“No,” said Barry. “People like us go in as much for the fun of it—the adventure—as anything; but he can’t anticipate experiences like that. Just shows you can’t judge any one; I’d have put old Smith down as an arm-chair patriot, if ever there was one, but he seems anxious to be thoroughly uncomfortable, if necessary.”

“Oh, he’s not half a bad fellow!” Jim said. “He’s so interested about things; it’s quite jolly to talk to him. And he’s keen about his nephew and the boys on the transports. There are lots of people worse than old Smith.” Thus dismissing the claims to respect of his fellow-passengers, Jim demanded volunteers for deck-quoits, and the party, having volunteered in a body, withdrew.

The captain’s gramophone was something of an institution on the ship. It was an excellent machine, and the captain loved it. Occasionally he was induced to bring it to the saloon at night, or, in the tropics, out on the deck; but his more usual form of entertainment was to invite a select few to his cabin for tea, an invitation understood to include music. It was not therefore, regarded as anything unusual when the Linton group declined the general tea-summons, and moved away in the direction of the upper deck. In the comfortable rooms under the bridge, tea was made the chief business of the gathering, and nothing was said of any other matter until every one was served and the stewards had withdrawn. Then the captain looked round the expectant faces.

“Well, I have not much to report,” he said. He produced a plan of the ship, showing the outer view of the port-holes. “That is your cabin window, Miss Norah. Now where did you see those flashes emerging?”

“From this one,” said Norah, unhesitatingly, indicating a port-hole. “Wasn’t it, boys?” Jim and Wally, looking over her shoulder, nodded confirmation.

“Ah, so I thought! Well, that cabin has no occupant—it’s a small vacant one.”

Disappointment showed plainly written on the faces of his three younger hearers.

“That, of course, proves nothing,” went on the captain; and the faces cleared immediately. “Any one could get in to use it; it is not locked. There are no signs of its having been occupied in any way, but then, no one using it surreptitiously would leave signs. We have one piece of evidence, however; the wind-scoop is a new one, but there are scratches on it that show it has been applied, possibly by a person who did not thoroughly understand how to insert it in the port-hole. Why, you blood-thirsty young people!—you look pleased!”

The three detectives had beamed, quite involuntarily. They laughed, a little shame-faced.