"Don't shoot," cried Stacy, ducking.
"You'll be shooting down into the Colorado," warned Nance. "You'd better watch out."
The rock indicated did very much resemble a battleship. The boys marveled at it. Then a little further on they came upon a sandstone plateau from which they could look down into the Indian Garden, another plateau rich with foliage, green grass and a riot of flowers. It was like looking into a bit of the tropics.
"Here is the worst piece of trail we have yet found," called Nance. "Go carefully," he directed when they reached the "blue lime." For the next few minutes, until they had passed over this most dangerous portion, little was said. The riders were too busy watching out for their own safety, the Professor, examining the different strata of rocks that so appeal to the geologist. He was entranced with what he beheld about him. Professor Zepplin had no time in which to enjoy being nervous.
From there on to the Garden they rode more at ease in the "Boulder Bed," where lay large blocks of rock of many shapes and sizes that had rolled from some upper strata. Small shrubs and plants grew on every hand, many-hued lizards and inquisitive swifts darted across the trail, acting as if they resented the intrusion.
Chunky regarded the lizards with disapproving eyes. But his thoughts were interrupted by the voice of the guide pointing out the Temple of Isis that looks down six thousand feet into the dark depths of the inner abyss, surrounded by innumerable smaller buttes. The wonderful colorings of the rocks did not suffer by closer inspection; in fact, the colors appeared to be even brighter than when viewed from the rim a few thousand feet above them.
Indian Garden was a delight. They wanted to tarry there, but were allowed to do so only long enough to permit horses and riders to refresh themselves with the cold water that trickled down through the canals from the springs far above.
Reaching the end of Angel Plateau they gazed down a sheer descent of twelve hundred feet into the black depths of the inner gorge, where flowed the Colorado with a sullen roar that now was borne plainly to their ears.
"It sounds as I have heard the rapids at Niagara do," declared Chunky somewhat ambiguously.
"All off!" called the guide.