some one to see that your sailorman is well taken care of."

Five minutes later Darrin and Dalzell were seated at a small breakfast
table with Mr. Lupton.

"Just before reaching here," began Dave, "it occurred to Mr. Dalzell
and myself that we have, beyond our card-cases, no means of
identification. Can you tell us how Mr. Caine will be sure that he is
talking with the right persons?"

"I believe that will be arranged all right," smiled Mr. Lupton. "I,
too, have taken you gentlemen on trust, but presently, I believe, we
are going to be satisfied."

Two minutes later there stalked into the room a tall, handsome young
man whose navy uniform set off his good figure to great advantage.

"Jetson?" exclaimed Dave, rising.

"The same," smiled the newcomer, advancing and holding out his hand.

He and Dave shook hands heartily, after which Dan came in for a
similar greeting.

Readers of the Annapolis series will recall Jetson as being a fellow
member of the Brigade of Midshipmen with Darrin and Dalzell at the U. S.
Naval Academy. At one time, there, Dave and Jetson had not been
good friends, but Dave had, at the very great risk of his own life,
saved Jetson from drowning. Now, the two young officers were on
excellent terms.

"I understand, now, what was darkness to me before," murmured Dave,
after Jetson had seated himself at table. "Admiral Timworth knew that
you were here, Jetson, and able to identify us."

"I have been here for three months," explained Jetson, smiling, "doing
some work to assist the naval attache of this Embassy, Commander
Tupper. I have had three months of the hardest work in this old
capital, but now, confound it, my work here has ended and I'm ordered
to join my ship. The bridge and the quarter-deck are places of boredom
to a fellow who has seen what I've seen here. Why, I've even made two
trips up to the front--one of them to Verdun."

"Lucky dog!" cried Danny Grin, with feeling. "So you've seen some of
the big fighting!"

"It may be well to state that I know fully the business on which you
are ordered here," Jetson continued, "so you may mention it freely
before me if you are so inclined."

"Then can you tell me," Dave asked, "if it is known how our enemies
propose to sink a British warship and make it appear to be the work of
someone in the American Navy?"

"I cannot," Jetson replied. "In fact, it was only on receipt of a
wireless from near Monte Carlo that the Ambassador had any know