For that reason little was done toward hunting for the kidnapped boy. The travelers did not go so far but that they could get back by nightfall.

They explored the city thoroughly and the professor found many more rare and valuable relics. His specimen boxes were full to overflowing, but still he kept searching.

The boys occupied themselves by getting the meals and attending to the camp, for the naturalist bothered himself about nothing but his specimens. They still continued to reside in the old temple, which they found a comfortable place.

“I wonder what we’ll do when our food gives out?” asked Ned one day when it was his turn to get the dinner.

“Why, haven’t we got plenty for several weeks yet?” inquired Jerry.

“It don’t look so to me,” said Ned, glancing in the box where the canned stuff was kept.

“That’s queer,” remarked Jerry. “There aren’t any tomatoes left. Did you cook any since yesterday?”

“You cooked yesterday,” retorted Ned. “Were there any then?”

“Six cans,” said Jerry. “Now there are none left. I wonder if the professor took any?”