But Darrin had not finished, for on the heels of his first order came the second:

“Open on her with every gun!”

After the wrecking of his conning tower the German commander began to bring his craft to the surface. Perhaps it was his intention to surrender.

“Full speed ahead!” roared Darrin, and Ensign Tupper rang in the signal.

The hull of the submarine was hardly more than awash when five or six shots from the “Logan” struck it at about the same time.

Veering around to the southward the “Logan” prepared to circle the dying enemy. The German craft filled and sank, and Darrin presently gazed overboard at the oil-topped waters through which he was passing.

“A wonderful job! I wonder that you had the nerve to risk it,” muttered Dalzell.

“I don’t know whether it was a wonderful job, or a big fool risk,” Dave almost chattered. “It would have been a fool trick if I had lost the ship by it. I don’t believe that I shall ever try it again.”

“If you hadn’t done just what you did, a second torpedo would have been sent at you,” murmured Dalzell. “You saved the ‘Logan’ and ‘got’ the enemy, if you want to know.”

Grinning, for the responsibility had not been theirs, and the ruse had “worked,” the men of the watch returned to their usual stations, while those off duty returned to their “watch below.” Darrin, however, was shaking an hour later. He had dropped the usual method of defense for once and had tried a trick by which he might have lost his craft. As commander he knew that he had discretionary powers, but at the same time he realized that he had taken a desperate chance.