“Indeed it is not extravagant to assume that these people are a remnant of the original inhabitants of Yucatan who built the famous cities of Palenque and Mazendla.

‪“If so, then I shall have the greatest curiosity to see them.”

“I’se a heap ’fraid we won’t see ’em to-day, Marse Frank,” said Pomp.

Another hour passed slowly.

Still the mysterious workmen did not return.

At the expiration of this time Frank decided to take a look about the premises.

The Steam Man was left carefully adjusted, and the three adventurers set out across the court-yard.

Of course they were heavily armed and did not intend to go out of sight of the Steam Man.

In crossing the court-yard they came upon a wonderful bit of work.

This was a square-shaped basin cut in whitest marble, and occupied by a bubbling spring with water as pure and clear as crystal.