"Make a landing, Jim," I cried, "there's a tremendous cave ahead there in the wall."
"All right," replied Jim.
So we swung our boat over into a quiet cave that was sheltered by gently bending branches of some flowering bushes.
Making our craft perfectly secure we took the trail to this new wonder that was carved in the great cliff.
"Well, this is immense," exclaimed Jim.
That expressed it. It was.
"It looks just like the entrance to some great and ancient temple."
"Whatever made it?" asked Tom, in amazement.
"Water," said Jim, "by a process popularly known as erosion."
"You got that out of the physical geography," said Tom.