The next moment he was all excitement, having evidently come across something on the side of the rock.
“Drawings!” he cried animatedly, pointing to the wall about him. “Prehistoric drawings of—of elephants!”
CHAPTER XX
The Horror of Thirst
“ELEPHANTS?” asked Bob, almost bursting out in laughter.
“Come on,” suggested Joe, moving slowly down the side of the fissure. “Let’s have a look at the strange drawings.”
The youths slid to the bottom, where Dr. Kirshner stood staring at the wall.
Bob nodded.
“Drawings of elephants, all right,” he said, his eyes on the etched rock. “And look how plain they are.”