Here Frank paused to extend his hand for another cup of coffee.

“You’re the wise little Scout!” declared Jimmie, admiringly.

“Sure!” agreed Frank. “Then,” he continued, “I floated around for the rest of the day on that hatch cover. Toward evening I saw a smoke off to the southwest. It was just out of the glare of the sun. When it got nearer I knew it was a steamer bound for England or some nearby place. It was the Anne of Melbourne. So here I am!”

“But what about this ‘U-13’?” inquired Harry, eagerly.

“Oh, yes, I nearly forgot,” said Frank. “The submarine that torpedoed the ship was marked ‘U-13’ on the side!”

“They’ve been doing a lot of that, according to the newspapers!” stated Ned. “But why do you warn us to look out for her?” he asked.

“When I told the captain of the Anne of my experience,” went on Frank, “he decided to head north, intending to go to the westward of Ireland, around between Scotland and the Shetland Island into the North Sea, in the hopes of dodging the submarine, which seemed to be working the waters of the English Channel. Yesterday morning we were hailed by a submarine. I could see that it was the same old ‘U-13’!”

“How did it get way up here?” questioned Ned, incredulously.

“Search me!” replied Frank. “They ordered us to heave to, but that captain is a daredevil. He cracked on all steam full speed ahead, declaring that if they took him they’d have to catch him.