“It’s beyond me, too. Of course, it’s easy enough for the submarine; but you’d think we’d be bound to spot a big cruiser.”

“Something will have to be done, sooner or later. What’s the use of a blockade if it doesn’t blockade?”

“Well,” said Frank dryly, “I have no doubt that if you have a plan, the admiralty would be glad to know it.”

“I haven’t any plan; but England will have to do something. That’s certain.”

“There is no question about that. Hello!”

“What’s up?” asked Jack, looking at his friend in some surprise.

For answer Frank pointed toward the east. Jack peered intently into the distance and also uttered an exclamation of surprise.

“Germans?” he asked.

“Must be,” replied Frank briefly.

He glanced ahead again. Then turned to his friend with an exclamation of satisfaction.