“I’m tired and sleepy,” said Dexter, as he sat upon the roots of an old tree, three or four yards from the water’s edge.

“Yah! you’re always sleepy,” said Bob.

“But I had to keep watch while you slept.”

“So you will have to again.”

“But that isn’t fair,” said Dexter, in ill-used tones. “It’s your turn to watch now.”

“Well, I’ll watch half the night, if you watch the other,” said Bob. “That’s fair, isn’t it?”

“Yes.”

“Then I shall lie down now, and you can call me when it’s twelve o’clock.”

“But I shan’t know when it is,” protested Dexter.

“Well, I ain’t particular,” said Bob, stretching himself beneath the tree. “Guess what you think’s fair half, and I’ll get up then.”