Trot knew it helped him to think when he was in any difficulty.

Also, the pipe did much to restore the old sailor's composure, after his long ducking and his terrible fright--a fright that was more on Trot's account than his own.
The sand was dry where they sat, and soaked up the water that dripped from their clothing.

When Trot had squeezed the wet out of her hair she began to feel much like her old self again.

By and by they got upon their feet and crept up the incline to the scattered boulders above.
Some of these were of huge size, but by passing between some and around others, they were able to reach the extreme rear of the cavern.
"Yes," said Trot, with interest, "here's a round hole." "And it's black as night inside it," remarked Cap'n Bill.
"Just the same," answered the girl, "we ought to explore it, and see where it goes, 'cause it's the only poss'ble way we can get out of this place." Cap'n Bill eyed the hole doubtfully "It may be a way out o' here, Trot," he said, "but it may be a way into a far worse place than this.

I'm not sure but our best plan is to stay right here." Trot wasn't sure, either, when she thought of it in that light.