"Look here," Frank said, "the kid took a picture of the slope back of the rock. Our pictures do not show that. Look up a short distance!"
Not very far up the slope hung a huge boulder which seemed on the verge of falling.
"If you'll notice the point of contact with the ground," Frank went on, "you'll see that the boulder is propped up by wedge-like stones put under it."
"Exactly!" Ned said. "And that means that the boulder has fallen or been pried out of its nest, and that the cavity behind it is regarded as a good hiding place."
"Do you think the prince could have been there?"
"Not when Jack and I were in that section. We saw him out on the slope."
"But he went back that way?"
"Yes."
"Tell you what!" Frank exclaimed. "I'm going to take these pictures home to Dad, and let him print them in his newspaper."
"You'll have to write a story to go with them."