"I don't see anything grand about it. I guess I won't lie down again.
I never can sleep any more after being awakened from my first nap,"
declared the fat boy.

No one slept for the rest of the night. The bombardment continued at
intervals all through the black, terrifying night. The Colorado, into
which billions of gallons of water had been dumped, was rising rapidly,
an angry, threatening flood.

"Is there any danger of the river overflowing on us?" asked Professor
Zepplin.

"No. No single night's rain would do it. The rain is pretty nearly
ended now, as you can see for yourself. But there's no telling how long
those fellows will continue to roll down. I've seen the same thing
before, but this is the worst," declared Dad.

"All on account of the Pony Rider Boys," piped Stacy. "Miss Nature
is determined to give us our money's worth in experience. I've had
mine already. She can't quit any too soon to suit me."

After a time the guide crept out, his ears keyed sharply to catch
warning sounds from above. Nance had been out but a moment when he
darted back under the protecting ledge. He was just in time. A giant
boulder struck the earth right in front of their place of refuge. From
that moment on no one ventured out. About an hour before daylight, the
storm having lulled, the failing boulders coming down with less
frequency, all hands sank down on their wet blankets one by one, and
dropped off to sleep.