“That wouldn’t have detracted from the grandeur of the scene. It must have all been very real to them. Why, this place must be as vast as the hugest cathedral.”

“It gives me the shivers,” said Joe. “Hark, how your voice goes echoing off there among the pillars.”

“I wish there was some way of climbing down through these eyes. I’d like to explore that temple. I wonder where the entrance is.”

“Must be on the other side of the island. In the meantime, let’s look at the head of the stairs there, and see if we can discover anything else.”

The boys flashed their lights about among the pile of mouldering relics and machinery of the ancient priests. Suddenly Nat gave a shout of triumph.

“What do you make of this?”

“This” was a huge chest, the lid of which, bound and embossed with dully glittering metal, was open. It was full of various articles, some of which gleamed and flashed with gems. Nat plunged in his hand and drew out a golden breastplate. Joe followed this discovery by drawing forth a cup of what seemed to be pure turquoise. Various head-dresses of precious metal, more cups and vessels of gold, all jewel studded, followed.

“Well, we’ve found it,” breathed Nat; “we’ve found it, Joe, old boy.”

“Yes, and now we have, let’s take what we can of this stuff and get out of here,” said Joe. “We’ll come back with more lights and company. It’s getting kind of creepy and lonesome in the dark here.”

The boys loaded themselves with all they could carry, including the turquoise cup, and stumbled down the stairway. It did not take them long to retrace their steps and dump down their prizes in front of the astonished professor. He declared that the value of the turquoise cup alone was inestimable, while the jewels in some of the breastplates and vessels were worth more than he dared to name.