A narrow shelf existed around, the verge of a huge inland sea, or basin, rather.
Frank Reade, Jr. stopped and looked keenly about him.
Then a chill struck him.
An inkling of the truth came to him.
“Heavens!” he gasped. “I think I can understand it now!”
“Phwat, sor?”
“The berg has collapsed on the side we entered by, and we are imprisoned by the change!”
“Shure, sor, ye don’t mean it?”
“Yes, I do.”
Barney was astounded. Then a light broke upon him.