“What! Is it a vein?” said Bart, eagerly.

“A vein, boy? It is a mountain of silver—a valley of silver. Here are great threads of the precious metal, and masses of ore as well. It seems as if it ran right down the sides of the canyon, and from what the Indian appears to know, it does, Bart, I never expected to make such a find as this.”

As he spoke, he handed pieces of the rock to Bart, who found that in some there were angular pieces of what seemed to be native silver, while others were full of threads and veins, or appeared as pieces of dull metalliferous stone.

“It is a huge fortune—wealth untold, Bart,” said the Doctor.

“Is it, sir?” said Bart coolly, for he could not feel the same rapture as the Doctor.

“Is it, boy? Yes! enormous wealth.”

“But how are we to carry it away, sir?” asked Bart dryly.

“Carry it away! Why, do you not understand that this mine will want working, and that we must have a large number of men here? But no; you cannot conceive the greatness of this find.”

As he spoke, the Doctor hurried to the mouth of the rift, and then cautiously lowered himself into the chasm, over which Bart had leaped, clinging to the stout stems of the various shrubs.

For a few moments Bart hesitated. Then he followed till they were both quite a hundred feet below the shelf, and the part of the rift they had first entered, and were able to creep right out till they were level with the side of the canyon, and able to look down to the river.