plan can be devised for beating a submarine torpedo boat at its own
game."

Lieutenant Kline was to remain on board the "Spitfire," both in order to
watch the work and to give Eph any instructions that might be necessary
in order to make the tests more conclusive.

"If you will come along with me, then, Mr. Benson," suggested Major
Woodruff, "I will put you ashore on the neck. On the way over I will
give you your instructions."

As the tug came alongside again Jack followed the major over the gang
plank to the deck of the other craft.

"Good-bye, Captain Somers," called Jack, laughingly. "Give a fine
account of yourself as an enemy of the United States!"

"Oh, you--" began Eph, flaring red, but wisely cutting his speech
short.

On the way over to the strip of land known as the "neck" Major Woodruff
managed to make his instructions wholly clear to young Benson.

"Now, you know what to watch for, and what observations, to report to
me," finished the major of engineers, as the tug came to a stop. A
small boat was lowered, and, in this, Captain Jack Benson was put on
the desolate shore.

Then the tug went back over by the fort. Jack grew tired of waiting,
for it was some two hours ere the tug finally left the ordinance wharf