"It is a strange-looking place for a castle to be built," he said, "but it quite answers to your description, Dias. There are certainly some openings, which may have been windows. I am sure no one looking from here, and ignorant that such a place existed, would notice it, and of course from the valley it could not be seen at all. Even from this height I do not think I can see more than ten or twelve feet of the upper part. But surely it must be noticeable to anyone coming along the cliffs?"
"It may be, señor, but I cannot say. Certainly no native would go along there even in the daytime. Still, it does seem likely that in the Spanish time some must have ridden along the top of the cliffs, and if they had seen the castle it would certainly have been searched. Assuredly it has not been so. I have been at Ancon and Salinas many times, and have talked with the people there. They would never speak on the subject to one of white blood, but knowing that I was of native blood, and belonged to one of the families to whom the secret could be strictly trusted, they were ready enough to talk about the Castle of Demons. Had the Spaniards ever searched it they would have known, and the place would no longer be feared; but all say that from the time of the conquest by the Spaniards no living being has, as far as is known, entered it."
"Then the Incas knew of it, Dias?"
"I think so, señor, though I have not heard that any of them ever lived there; but tradition says that the vessel in which a great store of treasure was sent away from Pachacamac, and which, as is proved by Spanish writings, was never heard of afterwards, and doubtless was sunk in a great storm that came on two or three days after it sailed, was intended to be landed and hidden in this castle, which they thought might well escape the observation of the Spaniards."
"And even among your traditions there is no allusion to what became of this treasure ship?"
"No, señor; all traditions say that it was never heard of from the day it sailed. Had it landed at that castle the secret would have been handed down to some of the native families, just as that of the golden valley and of other hidden treasures has been. But there can be no doubt that the ship was lost with all her treasure."
"Well, we need not talk any more about it now, Dias; we shall learn nothing more, however long we stay here and stare at it."
They stopped half an hour for breakfast and then rode down the valley. When they got near the spot where it closed in Harry saw by the pallor on the native's face that he was beginning to be greatly alarmed.
"You had better stop here, Dias. My brother and I will go on and explore this ravine and have a look at the place. We will take some ropes with us, for the ravine may be blocked by falls of rocks, and we may have to let ourselves down. Evidently the water gets to the sea, or this valley would be a lake like that in the golden ravine, for although it is but a mere driblet of water now, you can see by the banks that a considerable amount comes down in the wet season. How it gets past the castle I don't know; I can only suppose that there is a passage for it underneath the building. We will take both our guns, Bertie, and our pistols. That there are no demons we are quite sure, but the place may have been used as a hiding-place for outlaws and brigands, who could find no better spot, as there was no fear whatever of its being discovered. We will take some bread and meat in our haversacks and a flask of spirits. Perhaps we shall be away longer than we expect, Dias, but at any rate we will not stop there after dark."
Tears were in the Indian's eyes as Harry and Bertie said good-bye to him and started, and when he saw them enter the ravine he sat down with his elbows on his knees and cried unrestrainedly. His wife went up to him and put her hand on his shoulder.