After greeting the submarine boys, Mr. Mayhew turned to the cadets,
calling their attention to the lines and outer construction of the
“Farnum.” Then he turned to the three submarine boys, signing to them to
crowd forward.

“These young gentlemen,” announced the lieutenant commander, “are Mr.
Benson, Mr. Hastings and Mr. Somers. All three are thoroughly familiar
with the Pollard type of boat. As the Navy has purchased one Pollard boat,
and may acquire others, it is well that you cadets should understand all
the working details of the Pollard Submarine Company’s crafts. A few of
you at a time will now step into the conning tower, and Mr. Benson will
explain to you the steering and control gear used there.”

Half a dozen of the cadets managed to squeeze into the conning tower. Jack
experienced an odd feeling, half of embarrassment, as he explained before
so many attentive pairs of eyes. Then another squad of cadets took the
place of the first on-lookers. After a while all had been instructed in
the use of the conning tower appliances.

“Mr. Benson,” continued the lieutenant commander, “will now lead the way
for all hands to the cabin. There he will explain the uses of the diving
controls, the compressed air apparatus, and other details usually worked
from the cabin.”

Down below came the cadets, in orderly fashion, without either haste or
lagging. Having warmed up to his subject, Jack Benson lectured earnestly,
even if not with fine skill. At last he paused.

“Any of the cadets may now ask questions,” announced Lieutenant Commander
Mayhew.