In a few moments, with Roger at his side, he reached the Explorer.

Entering the vestibule, Frank turned the pump valve and pumped the water out of the compartment.

Then he removed his diving suit.

Roger did likewise.

The young man was enthusiastic.

“Wonderful experience!” he cried; “truly I am a fortunate man to have been given the opportunity.”

Frank gave Barney directions to go ahead.

Then he went back to the cabin.

The Explorer once more went on its submarine course.

Frank drew out a number of charts and spread them upon the table.