"Oh, that submarine business!" remarked Lieutenant Bourne modestly. "Just an ordinary occurrence, don't you know, except for one thing. I was officer of the watch at the time. We spotted a strafed unterseeboot flying a white flag. Have to be jolly careful, you see. Either give the thing a wide berth, and wireless the destroyers to take possession of the prize, or else cut the brute in two. Anyhow, something funny did happen. There were two fellows in mufti standing close to the skipper on the submarine's deck. Goodness only knows why they did it, but I saw one of them——"

"Cut the halliards and let the white flag down," interposed Vernon.

There was dead silence in the room. Only intense excitement was responsible for young Haye's lapse of manners. The words had slipped from him almost unconsciously. Ross barked his shin as a gentle reminder.

"By Jove! How did you know that?" demanded Bourne. "Shouldn't have thought that the yarn had had time to travel very far. Hope I haven't been boring you?"

Vernon took his courage in his hands.

"It was Ross who cut the halliards," he announced. "We were both on board, and jumped overboard just in time, and got hold of a lifebuoy dropped from the Tremendous as she passed."

"By Jove!" ejaculated the Lieutenant. "I am surprised. I wondered whether you were picked up. It was a jolly plucky action. But how did you get on board the unterseeboot?"

"Aye, out with it!" added the Admiral. "I heard that you were missing, of course, and also of your return. Truth to tell, I thought when I got your letter that the pair of you had been acting the goat, and had run away to sea and had thought better of it."

"We didn't run, sir, we were carried," explained Ross. "And Dr. Ramblethorne was responsible for it."

Admiral Sir Peter Garboard was not satisfied until he had heard the complete story of his young friends' adventures. When they had finished he turned to his nephew.