"Not yet."
"They must be making some wonderful discoveries. Hullo! so the others went to sleep, too? Don't you want a nap?"
"Well, I'll take forty winks, if you'll promise to keep a good lookout."
"I'll do that. I'm as fresh as a daisy now."
Tom leaned back against a tree, and in a minute more was in slumber-land. When the others awoke, they did not disturb him, consequently it was some time after sunrise when he opened his eyes.
"I declare! I've had a regular sleep!" he cried. "Why didn't you wake me up?"
"We didn't think it necessary," said Fred.
"Have they got back?"
"No."
At this, Tom's face grew serious.