“What a wonderful place this must have been when it was lighted up,” spoke Tom.

“Do you think it was ever lighted up?” asked his chum.

“It must have been,” declared the young inventor.  “My idea is that this city was the home of the priests of the temple, and their friends.  I don’t believe the common people ever came here.  Perhaps the officers of the army, the rulers and the royal family were admitted, but not the ordinary people.  That’s why it’s so far underground, and so well guarded by the river.”

“Probably the priests and others collected so much gold they didn’t know what to do with it, and built this city to use it up, and, at the same time have a safe place to store it.  And they must have had some means of lighting the place, for they couldn’t go about in darkness—­they couldn’t have seen the gold if they did.  Yes, this must have been wonderfully beautiful then.  The priests probably came here to study, or perhaps to carry out some of their rites.  Of course it’s only guesswork, but it seems true to me.”

“I believe you’re right, Tom,” said Mr. Damon.

As our friends walked about they saw that the city, while smaller than they had at first supposed, was laid out with regular streets.  Each one was straight, and at certain places in the stone pavement plates of gold were set, so that literally the streets were paved with gold.  There were houses or buildings on each side of the streets, and most of these were open at the doors or windows, for there was no need of heat in that buried city.

All about were the golden images such as they had seen in the Mexican’s house, and like the one in far off Africa.  Some of the images were almost life size, and others were only an inch or two inches in height.  Not a house but had half a dozen or more in various places, and there were also the images on golden pedestals about the streets.

“This must have been their chief god, or else a representation of some great personage to whom they paid the highest honor,” said Mr. Damon.  “Perhaps he was the reigning king or ruler, and he, himself, might have ordered the images made out of vanity, like some men of to-day.”

The boys agreed that this was a natural theory.  As for Eradicate he was busy collecting numbers of the small golden statues, and stuffing them in his pockets.

“Why don’t you take bigger ones, and not so many of them?” asked Tom.

“’Case as how I doan’t want all mah eggs in one basket,” replied the colored man.  “I kin carry mo’ ob de little fellers,” and he persisted in this plan.

They found in some of the houses utensils of solid gold, but there appeared to be no way of cooking food, and that was probably done outside, or in the great temple.  In many houses were articles evidently used in the sacrificial rites or in worship of strange gods.  They did not stay to half examine the wonderful city of gold, for it would have taken several days.  But on Tom’s advice, they took up a considerable quantity of the precious metal in the most convenient form to carry, including a number of the statues and art objects and started back along the tunnel.