"And from perfectly massive rocks to the most perfectly stratified sediments there are represented a considerable variety of masses belonging to different ages—a very complete section of the Palaeozoic and a rather full sequence of the latter deposits which recline against the older strata."

"Yes, sir," agreed Ned meekly.

"A-h-e-m. And now having thus enlightened you, we will proceed with our quest for something to eat. I trust my explanation has been perfectly clear to you all?" queried the scientist, with the suspicion of a twinkle in his eyes.

"With all due respect to you, sir, I must confess that I didn't understand a word of it," answered Tad boldly.

"I hadn't the slightest idea that you did," retorted the Professor, with a hearty laugh. "Our friend, Master Stacy, appears to be the only one of you who grasped the scientific truths."

The boys shouted with laughter.

Ned Rector proposed three cheers for Professor Zepplin, which were given with a will.

Stacy, rather crestfallen, joined in the cheering, weakly, however.

"It is well to give thought now and then to more serious matters, boys. After we are out of our present difficulty I will put what I have just told you into more simple language—language that you will all understand. This is the most unusual country we have been in yet, and I want you to leave it with a pretty clear idea of the lessons it teaches. How far is it to where our provisions were dumped?"

"It will take us an hour to get there, I should say," replied Tad.
"We had better be on our way."