t that," said Frank. "All we have to do
is submerge and move off."

"And I suppose these other fellows will remain idle and watch us go,"
exclaimed Lord Hastings sarcastically. "Don't you believe it. We are
likely to have trouble. They'll probably have a shot or two at us and
we'll be fortunate if one doesn't strike home. Besides which, if we do
get down safely, they'll probably chase us."

"Well, they can't find us under the water," Frank stated.

"Perhaps not," agreed Lord Hastings, "but we'll have to come up some
time and when we do they are likely to be waiting for us. However, there
is no use hesitating now. Every minute makes our situation more
precarious. You may submerge to five fathoms, Mr. Templeton."

Quickly Jack gave the command. Immediately the bridge wound into the
little conning tower, which at once closed, and the submarine began to
sink gradually.

Lord Hastings glued an eye to the periscope and watched developments
above.

"Just as I feared," he exclaimed. "They have seen through our ruse.
There is excitement aboard all the enemy. Twenty knots, Mr. Templeton,
and shape your course due north."

The little craft leaped ahead as Jack gave the command; and at the same
moment a torpedo, fired by the nearest enemy craft, flashed through the
water where the U-6 had been a moment before. It was a narrow escape.

A second torpedo flashed above the submarine just as it finally
disappeared beneath the water; and a third did likewise.

Lord Hastings drew a breath of relief as he moved from the periscope--he
could see no longer, the water having passed over the "eye" of the
submarine.

"We're safe enough for the time being, at any rate," he declared. "Keep
to your course, Mr. Templeton, until I give the command to alter it."

Jack saluted.

"Very well, sir," he said.

"And now," said Lord Hastings, gazing about, "the question remains as to
what is to be done with Davis. Where is he?"

Frank looked about hurriedly.

"He was here a moment ago, sir," he replied. "He was right behind me."

"Well, he's not here now," said Lord Hastings. "There is no doubt about
that. However, he can't have gone very far. We'll have a look for him."

Frank followed his commander aft.

They peered into every compartment in that end of the vessel. They
searched the engine room and all other sections; but there was no sign
of Davis; Lord Hastings scratched his chin in perplexity.

"Now what do you think of that?" he