“Well, it may not be quite as bad, but it’s bad enough,” qualified Nestor. “But don’t let me discourage you. Go ahead, this is a free country.”

So it was arranged. The boys decided they would start in three days, taking the professor with them.

“And we’ll find that buried city if it’s there,” put in Ned.

The next few days were busy ones. At Nestor’s suggestion each one of the boys had a stout money-belt made, in which they could carry their cash strapped about their waists. They were going into a wild country, the miner told them, where the rights of people were sometimes disregarded.

Then the auto was given a thorough overhauling, new tires were put on the rear wheels, and a good supply of ammunition was packed up. In addition, many supplies were loaded into the machine, and Professor Snodgrass got an enlarged box made for his specimens, as well as two new butterfly nets.

The boys invested in stout shoes and leggins, for they felt they might have to make some explorations in a wild country. A good camp cooking outfit was taken along, and many articles that Nestor said would be of service during the trip.

“Your best way to go,” said the miner, “will be to scoot along back into New Mexico for a ways, then take over into Texas, and strike the Rio Grande below where the Conchas River flows into it. This will save you a lot of mountain climbing an’ give you a better place to cross the Rio Grande. At a place about ten miles below the Conchas there is a fine flat-boat ferriage. You can take the machine over on that.”

The boys promised to follow this route. Final preparations were made, letters were written home, the auto was gone over for the tenth time by Jerry, and having received five hundred dollars each from Nestor, as their share in the mine receipts up to the time they left, they started off with a tooting of the auto horn.

“That’s more money than I ever had at one time before,” said Bob, patting his money-belt as he settled himself comfortably down in the rear seat of the car, beside Professor Snodgrass.

“Money is no good,” said the naturalist.