avis hors de
combat, but there was no Davis there.

Lord Hastings was greatly crestfallen.

"I should not have forgotten him," he said. "He may work more mischief
around here."

"The chances are, knowing he has been discovered, he'll make himself
extremely scarce," suggested Frank. "He'll probably figure that his
usefulness here is at an end."

"Well, that's probably true," admitted Lord Hastings.

"We'll come across him again some place," said Jack. "I wonder if he
recognized us as the ones from whom be obtained his information?"

"I wonder, too," said Frank with a laugh. "If not, he probably believes
we are in trouble. Guess he will imagine we have been executed as spies
by this time."

"To tell the truth, I don't believe he recognized us," said Jack. "We
were too far away for that."

"Except for the time he laid me out down the street there," said Frank
ruefully. "Then the chances are he didn't take time to look at me. And
he was unconscious when we came upstairs here. No, I don't believe he
recognized us."

"Well, I hope we shall have the pleasure of introducing ourselves to him
more fully at some future date," said Jack.

"And I have a hunch that we shall," declared Frank.

"There is nothing more to be done here," said Lord Hastings at this
juncture. "We'll get back to our boat."

Accordingly they took their leave of the house, and half an hour later
were again moving down the waters of the Thames.

"Where to now, sir?" asked Frank.

Lord Hastings smiled slightly.

"Can't wait until you find out, eh?" he replied. "Well, I'll tell you.
We are about to do a little submarine chasing."

"Submarine chasing?" exclaimed both lads.

"Exactly."

"Good!" ejaculated Frank. "And where is our vessel, sir?"

"If you will look about a little you will see it," replied Lord
Hastings.

Frank and Jack let their eyes roam over the broad expanse of the Thames,
but they could see nothing but a few small boats of various
sorts--nothing bearing the slightest resemblance to a ship of war.

"I don't see anything that looks like it, sir," declared the boy.

"That," said Lord Hastings, "is because you insist on looking too far
away. You don't see it for the reason that you are sitting in it right
now."

"What, sir?" exclaimed Frank. "Sitting in it now? You mean we are going
submarine chasing in this motorboat?"

"Exactly," replied Lord Hastings.

"But, sir----" began Jack.

"You'll find," interrupted Lord H