Thus equipped they left the submarine boat.
This was done by running the boat close to a shelf of the berg, upon which the two explorers stepped.
“We will soon return,” said Frank to Pomp. “Keep a lookout for us.”
“A’right, sah!” replied the darky.
Then Frank and Barney struck into a crevice of the cliff, through which they climbed to heights above.
This brought them, to their surprise, to the mouth of a wonderful cavern, which seemed to extend down into the heart of the berg, how far they knew not.
“Wonderful!” cried Frank, excitedly. “I have never seen anything more beautiful, Barney!”
“Shure, sor, there’s nothin’ short av Oireland loike this!” conceded Barney.
“What a tremendous cavern!”
“Ay, sor!”