“How about the Ajo Mines?” challenged Sid. “And there’s lots of ore north of Sonoyta, only it costs too much to work it. You know that yourself.”

“By gosh, you never can tell!” exclaimed Scotty, excitedly. “It’s possible, though! There’s granite outcropping, even down at MacDougal Pass, only fifteen miles from Pinacate. We’ll try it!”

“Hope it isn’t in Mexican territory—but no, ‘twenty-one miles northeast of Pinacate,’ the plaque says——”

“Gee! Le’s see it!” cried Scotty eagerly.

Big John grinned sardonic grins as the two youths got the plaque out of Sid’s saddlebags and held it between them, scanning it excitedly. He heard Scotty eagerly bark out the word “‘aurum’—gold?” and shook his head.

“’Pears to me that every white man but me goes crazy over that word ‘gold’!” he growled whimsically. “Fellers will lie, steal, murder, get themselves killed with thirst or et by grizzlies—an’ all for somethin’ that they don’t want when they’ve got it!” he exclaimed. “Scotty, ef it warn’t for you bein’ a minin’ engineer I’d warn ye to leave it alone!” he said positively. “Exceptin’ it’s now November and the tanks is probably full down thar, I wouldn’t let you go, nohow.”

But Scotty was hardly listening to him. A planning look was in his eye and his engineer mind was already envisioning not the mine itself but the practical ways to get out the metal.

“Ship base in Adair Bay; burros up to the mine; carry the ore in bottoms through the Panama Canal to the East, where we can get cheap process reduction—Gee! There’s nothing to it!” he averred enthusiastically.

“C’rect—nawthin’ a-tall, li’l hombre!” grinned Big John sardonically. “No water; no feed for yore burros; no road—an’ no mine!” he declared.

“Yes, but ships, John!” urged Scotty. “That’s different. We can send out a year’s supply of hay, oats and supplies for the camp just as they do at Las Pintas, and bring back the bottoms in ore. It’s mighty different from some inland proposition, hundreds of miles from either rail or sea routes. If this tablet is reliable, the engineering side of it is a cinch! Le’s hear the ethnologist.”