Stein to the captain, indicating the two lads. "I have not
learned their names nor rank."

The two lads hastened to introduce themselves.

"I am Captain von Cromp, commander of this vessel," said the
captain gruffly. "You are my prisoners until I put into port and
can turn you over to the proper authorities."

Jack and Frank bowed in recognition of their fate. The captain
turned to Lieutenant Stein.

"You will see that the prisoners are well cared for," he said.
"They are in your custody."

The lads glanced curiously about as they were led along toward
the lieutenant's cabin. It was the first time either had been
inside a submarine vessel, and both felt a trifle squeamish. The
boat was upon the surface of the sea now, however, and a dim
light penetrated below.

The lieutenant's cabin, well forward, was fitted up luxuriously.
There were several bunks in the little room, and the lieutenant
motioned to them.

"You will sleep there," he said quietly. "Make yourselves
perfectly at home. I guess there is no danger of your attempting
to escape. However, you must remain below and not ascend to the
bridge under any circumstances."