lost in wonder.

"Buck up now!" urged the guide.

"I am bucked. Leggo my neck. I won't make a fool of myself this time,
I promise you."

"You can't blame him," said Tad, rising from his perilous position and
walking calmly back to them. "I nearly got them myself."

"Got what?" demanded Stacy.

"The jiggers."

"That's it. That describes it."

Professor Zepplin, who had informed himself before starting out, now
turned suddenly upon them.

"He's going to give us a lecture. Listen," whispered Tad.

"Young gentlemen, you have, perhaps, little idea of the vastness of that
upon which you are now gazing."

"We know it is the biggest thing in the world, Professor," said Ned.

"Imagine, if you can," continued the Professor, without heeding the
interruption, "that this amphitheatre is a real theatre. Allowing
twice as much room as is given for the seat of each person in the most
comfortable theatre in the world, and you could seat here an audience