"Clearly," he said, "what we should do first is to find out if any one leaves the valley for the pool. As far as we know, there is the gorge up which we came, but there may be openings direct from the valley into the underground passages. We will leave the pool alone, as if we had had enough of it, and examine the interior cliffs."

CHAPTER XIX

THE MAKER OF LAWS

The discovery made as to the source of Deadman's Pool gave a new interest to the valley, and the boys played the role of detectives under an arrangement to report the results of their investigations at night. Each spent a day of careful observation, and at the camp- fire each wore a look of preoccupation.

"Any success?"

They nodded their heads.

"I met the chief's mother at the council tree," said Mr. Hume, "and she said she would pay us a visit in the morning. She has been ill, or she would have come before."

"Well," said Venning, "I met a boy five minutes after I left the cave, and he stuck to me like a leech."

"One followed me also," muttered Compton.

"Seems to me we are under police inspection."