But another discovery was made.

Before the large idol was a broad and richly carved altar. Below it was a pit for the reception of the blood of the victims.

The two explorers gazed upon this gruesome object with a thrill.

“Many a poor wretch has gone to his doom on that stony surface,” declared Frank. “What barbarity!”

“True,” agreed Wade; “the ancient ideas of sacrifice were something simply savage.”

No small object of any kind of metal could be found. Every vestige of any material but stone had been absorbed by time and the water.

So Wade could find no other specimen to take with him but a small idol, which he placed in his pocket.

“I shall keep this for a talisman,” he declared. “Perhaps it will bring me good luck!”

“I believe I will do the same,” said Frank; “so here goes.”

He also took one of the idols. Then they left the temple.