“Of all things!” exclaimed Bob, rubbing his forehead in perplexity. “That skin has disappeared as if by magic!”
Joe glanced at his chum, then at the boma. He looked around the other side, but the white skin was nowhere in sight. Finally he straightened up, a look of supreme bewilderment on his face.
“Gone sure enough,” he said.
“Are you certain you put it there?” inquired Mr. Holton.
“Certainly we did,” Bob assured him. “What I can’t understand is why the boma wasn’t torn to pieces. If some wild animal——”
“Maybe it wasn’t a wild animal,” put in Joe.
“Then—what could it have been?”
“Beyond me.” Joe had no suggestion of an idea.
The two naturalists took up where their sons had left off and searched the vicinity of the boma. But they had to admit defeat.