Dias nodded.

"What you say is true, señor. I could take you to a dozen places where there is silver. They may be good or may not, but even if they were as rich as Potosi the silver would have to be carried to Lima, so great a distance on mules' backs that it would swallow up the profits. And it would be almost impossible to convey the necessary machinery there, indeed to do so would involve the making of roads for a great distance."

"At the same time, Dias, should you know of any silver lodes that might turn out well, I would certainly take some samples, and send two or three mule-loads of the stuff home. They might be of no good for the purpose for which I have come out here, but in time I might do something with them; the law here is that anyone who finds a mine can obtain a concession for it."

"That is so, señor, but he must proceed to work it."

"I suppose it would be sufficient to put two or three men on for that purpose."

"But if you were away for a year difficulties might arise. It would be better for you only to determine the course of the lode, its thickness and value, to trace it as far as possible, and then hide all signs of the work, and not to make your claim until you return here."

"Very well, I will take your advice, Dias. And now about the real object of our journey."

"I have been thinking it over deeply," Dias said. "First as to mines; at present almost all the gold that is obtained is acquired by washing the sands of rivers. Here and there gold has been found in rocks, but not in sufficient quantities to make mining pay. The rivers whose sands are richest in gold are in the mountains that lie behind Lake Titicaca, which lies to the south of Cuzco and on the border of Bolivia. No one doubts that in the time of the Incas there existed gold mines, and very rich ones; for if it had not been so it is impossible to account for the enormous amount of gold obtained by the Spanish conquerors, and no one doubts that they got but a small portion of the gold in existence when they arrived. It is of no use whatever for us to search the old ruins of the Incas in Cuzco, or their other great towns; all that can be found there has already been carried away.

"Now you see, señor, Huanuco, Jauja, Cuzco, and Puno all lie near the eastern range of the Andes, and when the alarm caused by the arrogant conduct of the Spaniards began, it was natural that the treasures should be sent away into the heart of those mountains. The towns on the western sides of this plateau, Challhuanca, Tanibobamba, Huancavelica, would as naturally send theirs for safety into the gorges of the western Andes, but all traditions point to the fact that this was not done by the Incas. As soon as the Spaniards arrived and struck the first blow, the great chiefs would naturally call together a band of their followers on whose fidelity they could rely, load the treasures on llamas, of which they possessed great numbers, and hurry them off to the mountains.

"It is among the mountains, therefore, that our search must be made. All our traditions point to the fact that it was along the eastern range of the Cordilleras, and the country beyond, that by far the greater portion of the treasures were taken for concealment. At any rate, as we have but eighteen months for the search it is on that side that we must try, and ten times that length of time would be insufficient for us to do it thoroughly. As to the gold mines, it is certain that they lie in that portion of the range between Cuzco and Lake Titicaca. It was near Puno, a short distance from the lake, that the Spaniards, owing to the folly of an Indian, found great treasures in a cave. They would probably have found much more had not a stream suddenly burst out which flooded the whole valley and converted it into a lake. Which do you think we had better look for first, gold mines or hidden treasures?"