Pachacamac was the most sacred spot in South America, vast numbers of pilgrims came here from all points. The city itself had entirely disappeared, covered deeply in sand, but for a long distance round, it had, like the neighbourhood of Jerusalem and Mecca, been a vast cemetery, and a small amount of excavation showed the tombs of the faithful, occupied in most cases by mummies.

"We will ride across to the Incas' temple. There is not much to see there, but it is as well that you should look at the vaults in which the treasures were hid. There are similar places at Cuzco and several of the other ruins."

"It may certainly be useful to see them," Harry agreed, and they rode across the plain. Leaving their mules outside they entered the ruins. The Indian led them into some underground chambers. He had brought a torch with him, and this he now lit.

"You have to be careful or you might otherwise tumble into one of these holes and break a limb; and in that case, if you were here by yourselves, you would certainly never get out again."

They came upon several of these places. The openings were sometimes square and sometimes circular, and had doubtless been covered with square stones. They were dug out of the solid ground. For about six feet the sides of the pit were perpendicular; in some it swelled out like a great vase with a broad shoulder, in others it became a square chamber of some size.

"Some of these places were no doubt meant to store grain and other provisions," the Indian said, "some were undoubtedly treasuries."

"Awkward places to find," Harry said; "one might spend a lifetime in searching for them in only one of these temples."

"They were the last places we should think of searching," Dias said. "For years the Spaniards kept thousands of men at work. I do not say that there may not be some few places that have escaped the searchers, but what they could not with their host of workers find certainly could not be found by four or five men. It is not in the temples that the Incas' wealth has been hidden, but in caves, in deep mountain gorges, and possibly in ruins on the other side of the mountains where even the Spaniards never penetrated. There are such places. I know of one to which I will take you if our search fails elsewhere. It is near the sea, and yet there are not half a dozen living men who have ever seen it, so strangely is it hidden. Tradition says that it was not the work of the Incas, but of the people before them. I have never seen it close. It is guarded, they say, by demons, and no native would go within miles of it. The traditions are that the Incas, when they conquered the land, found the place and searched it, after starving out the native chief who had fled there with his followers and family. Some say that they found great treasure there, others that they discovered nothing; all agree that a pestilence carried off nearly all those who had captured it. Others went, and they too died, and the place was abandoned as accursed, and in time its very existence became forgotten; though some say that members of the tribe have always kept watch there, and that those who carelessly or curiously approached it have always met with their death in strange ways. Although I am a Christian, and have been taught to disbelieve the superstitions of my countrymen, I would not enter it on any condition."

"If we happen to be near it I shall certainly take a close look at it," Harry said with a laugh. "I don't fancy we should see anything that our rifles and pistols would find invulnerable."

It was getting dark by the time they had finished their inspection of the rooms, so, riding two or three miles away, they encamped in a grove up the valley. Next morning they returned to Lima. Dias had given out that the two white señors intended to visit all the ruined temples of the Incas, and as other travellers had done the same their intention excited neither surprise nor comment.