“He’s got a cave in that hill,” Bob announced.

“Looks like it,” Jack agreed.

“Him there,” Kernertok grunted.

“Then the next thing’s to get him out,” Jack proposed.

“Suppose you invite him,” Bob suggested.

“I will. Hello, in there. You might as well come out. We’ve got you trapped,” he shouted.

There was no reply and, after waiting a moment Bob said:

“He or it doesn’t seem much inclined to accept your invitation. Guess I’ll have to go in after him.”

“Yes you will, not.”

“If not why not?”