cruiser Hawke off the coast of Scotland.

"What?" cried both boys in one voice.

"Exactly," said Lord Hastings grimly, "and it is for the purpose
of attempting to discover some of these under-the-sea fighters,
or other German warships, that we have come back. The whole
North Sea is being patrolled, and we are bound to come upon some
of the Germans eventually."

"Well, I hope we don't have to wait long," said Frank.

"And so do I," agreed Jack. "I hope that every German ship
afloat will be swept from the seas."

The Sylph did not go within sight of the English coast, but for
two days cruised back and forth, east, west, north and south,
without the sight of the enemy.

This inaction soon began to pall upon the two lads, to whom a
fight was as the breath of life itself.

"I wish we had continued on our way, wherever we were going, and
not have come back here," said Jack to Frank one afternoon.

"This is about the limit," agreed Frank. "I believe we would
have done better to have joined the army. At least we would have
seen some fighting."

But the boys desire for action was to be soon fulfilled. The