The tunnel at this point was very wide and fully two thousand feet deep.
“Can you notice any peculiarities in this crevice?” asked Mr. Bruce of Mr. Graham.
“None,” replied Mr. Graham, “unless it be its crookedness, but they are all crooked. But why do you ask?”
“I was just thinking,” said Mr. Bruce, “that we might have occasion to use this crevice some day.”
“I hope not,” replied Mr. Graham, “for if we had to trust to scaling these perpendicular walls, I am afraid we would perish here at the bottom.”
“Yes,” said Mr. Bruce, “but it is well to have several strings to your bow.”
“It might be possible,” said Mr. Graham, “to lower one’s self into this cavern, but I don’t believe it would be possible to hoist one’s self out of it.”
“We may have occasion some day to lower ourselves into it,” said Mr. Bruce. “At any rate, we have found another way to enter the Land of On.”
“But one never to be used as long as the other is open,” said Mr. Graham.
“As you like,” said Mr. Bruce. “Shall we return, Onrai?”