“Begorra, I’ll sthay an’ watch out fer sharks if yez want to go,” said Barney to Frank.

The young inventor very quickly made up his mind.

“Upon my word I’ll do it!” he cried. “Get ready, Pomp. Perhaps we’ll make a find.”

The darky was delighted with the prospect.

He was quickly ready.

Going into the vestibule both put on their diving suits.

Then Frank turned a cock and the compartment began to fill up with water.

The storage reservoirs on their backs began to work, keeping up a current of wholesome oxygen.

Frank opened the door and stepped out upon the platform.

It required a few moments for them to get used to the tremendous pressure of the water.