"I am game," Bertie said. "There is a lot more excitement in working when possibly a treasure lies under your feet than in chopping away at trees, some of which are so hard as almost to turn the edge of an axe.

The place cannot be very large, so it won't take us very long if we are obliged to tear up every foot of it. I suppose there cannot be above three feet of stone over the mouths of any of these vaults."

"I think, Bertie, that when we have once investigated the place and settled on our plans, we had better send Dias and Jose down to Callao to get three or four kegs of powder and some boring tools, besides a supply of provisions. We should get on a lot faster with these than with only pickaxes. We shall want a couple of strong iron crowbars for lifting slabs of stone, and of course some fuse for the mines."

"We should have to be careful not to put too much powder in, so as not to bring the whole thing down about our ears."

"Oh, we should not want to make a mine of that sort, but only to blast the stone as they do in quarries and mines. We should have to make a hole to begin with, by means of our picks and crowbars, in one corner of the room, two or three feet wide; then we must make a couple of holes the size of the boring tool, a foot or so away, according to the hardness of the ground, put in charges and fire them, and in that way blow down the rock into the hole we had made; and so we should go on until we had done the whole floor. Of course, the bigger the hole we first make--that is to say, the wider the face it has--the easier we shall blow the stone down afterwards. I have watched them blasting stone at Portland, and at some galleries they were making at Gibraltar, and I know pretty well how it is done. Of course it is hard work driving the borers down, for that we shall want two or three sledges of different weights. It will make our arms ache at first, but after a week or two we shall be able to stick to it fairly well. Now we had better turn in. We shall start at daybreak tomorrow. It will take us two hours to reach the spot from which Dias said we could see the place, and another three hours to get to the castle. That will give us a long afternoon to take our first look over it."

"There, senor," Dias said, when at eight o'clock in the morning they stopped on a projecting spur of the hill, "that is the castle!"

From where they stood they could see that the ground fell away into what was at first a mere depression, but gradually deepened into a valley half a mile wide. Still farther down the sides became more precipitous, and in the distance the valley was closed in by rock walls, and appeared to come to an end. That it did not do so was evident from a streak of bright green in the centre of the valley, showing that a small stream must run down it. From the point at which they stood they could see the level line of the plateau near the cliff facing the sea, and on the surface of this a dark zigzag line marked the course of the ravine. Then, when apparently close to the termination of the flat land by the cliffs, the dark streak widened out somewhat. Through a small but powerful telescope which Harry carried he could make out distinctly the upper part of what might be a house.

"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, senor, 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.

a.s.suredly 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, senor, 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, senor; 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 pa.s.sage 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.

"Do not sorrow, Dias; as for me, I have no fear, though I love them as well as you do. I do not say that there may not be demons in the castle--everyone says there are;--but though these may strangle our people who break the orders that were given that none should go near, I do not believe they can hurt our white friends. You saw that they had no fear; you know how brave they are, and how they laughed at the idea of the demons having any power over them. Do you think I could smile and talk if I thought they were in danger? Still, as there is no need to prepare dinner yet, I will tell my beads over and over again. We shall know if any harm comes to them if we hear them fire their guns, for it is certain that they would do so. Even if a legion of demons attacked them they would never run away, but would fight till the last."

"I love them," Dias said; "I love them as my own sons. At first, when they came to me from Senor Barriett, it was for his sake that I consented to accompany and aid them; but from that night when they saved my life by rushing, with no weapons save their sticks, into the midst of five men with drawn knives, I felt how n.o.ble they were, and I loved them not only for the sake of my life, but for their bravery.

Since then my feelings have grown every day. Have they not treated us as equals, as they would do people of their own race--us who, by every Peruvian with white blood in his veins, are looked down upon?"

"It is true, Dias. They have laughed and joked with us, and have treated me with as much respect as if I had been of pure Spanish blood, and have always done everything they could to make things easy for me.

I will not believe G.o.d and the Holy Virgin can permit them to be overpowered by the evil ones. Should it be otherwise, should they never return, I should be inconsolable. It would be to me as if you yourself had died, and I should be ready to stab myself to the heart at the thought that we had brought them here."

"I could not live after it either, Maria; but, as you say, I will trust that G.o.d will protect them."

He cut down two rods and fastened them together in the form of a cross, and then he and his wife knelt before it and repeated innumerable paternosters and Ave Marias, crossing themselves as they did so.

Jose, as soon as he had removed the burdens from the mules and turned them out to graze at the edge of the streamlet, came and joined them in their supplications, occasionally breaking off from the repet.i.tion of the only prayers he knew, and in his native language imploring the saints to protect their friends.

"There is no humbug about Dias," Bertie said as they left the others.

"He is really in a blue funk."

"Yes, he is quite in earnest; and we know that he is no coward in other matters."

"Certainly not. He showed any amount of pluck in the affair with the Indians. But he seems such a bright, sensible sort of chap, that it is quite funny to hear him going on about his demons. I should not be surprised at anything the ordinary peasant might believe, but it is different with a man like Dias."

"You know, Bertie," Harry said, coming to a sudden stop, "I think we are making a mistake going on into this ravine. I have no belief that the place is inhabited; still, there may be desperadoes, and perhaps a few fanatics. It is quite possible that a certain number of families bound themselves to keep watch here, and formed a little community that has lasted to the present day."

"But how could they have lived?"

"We will talk that over, Bertie, if we find any of them there. Now we must turn back. It is not more than a mile at the outside to the place where we can climb the hillside. In that way we shall be able to look down into this ravine, and take a general view of the place. We shall know what we are doing then, whereas if we were to go on through the gorge without knowing anything about it, we might find ourselves caught in a trap. It won't make half an hour's difference, for the ground up there will be as good walking as it is here, while we might find all sorts of obstacles in this ravine, and with two guns apiece, ammunition, pistols, coils of rope, food, and so on, we should find it awkward work climbing among heaps of rocks.

"You were saying, How could a group of people exist here for centuries without any communication with the outside world? Well, I don't suppose they could. They might get water from the stream, and possibly there may be some way of getting down to the sea-sh.o.r.e; anyhow, this stream must find a pa.s.sage when it is in flood. They might have been able to get enough fish for their wants; but a fish-and-water diet would scarcely be sufficient.

"At the same time we are by no means sure that they could have had no communication with the outside, for just as some families may have been ordered to live here, others may have been instructed to supply them with food. The watchers may have had a store of gold-dust sufficient to last them all this time, and their friends outside may have brought them a sheep or two, and corn and other articles of necessity once a week. There could have been no difficulty in doing so. The stories of demons, and probably the murder of inquisitive people who tried to pry into what was going on, created such a dread of the place that those in the secret would come and go without the slightest difficulty.

Conceivably, young men may from time to time have gone out for a year into the world and brought back wives with them, or girls may have been sent by the people in league with them outside, and obtained husbands, which is less likely. I should think it was more probable that young boys and girls would be kidnapped, and brought in here from time to time. All this is pure guesswork, of course, but nevertheless there may be people here, and it is just as well to take a look round from above before we trust ourselves inside the place."

On gaining the plateau they followed the crest of the valley until they came to a spot where the ravine appeared to end. They found that in fact it made a sharp turn. It was here only some ten feet wide, but soon broadened out to thirty. Fifty yards farther there was another sharp bend, the ravine narrowed to twenty feet, and the sides became absolutely perpendicular. Twenty yards farther still they saw something like a wall about thirty or forty feet high stretching across the gorge, which was here some seventy feet deep. About twenty feet from the foot there was a steep ascent of rocks, such as might have fallen there by a slip from one side or the other. Above these a perpendicular wall rose for another twenty-five feet. Harry and his brother looked at it in surprise from the height at which they stood. Its appearance was precisely that of the wall-precipices on each side. It was rough and uneven, and they could see no signs of any joints.

"It looks as if it were natural," Bertie said, "but it can't be."

"No, it must certainly be artificial, but it is a wonderful imitation, and certainly anyone coming up the ravine would suppose that bank of rocks at the foot had fallen from its face; but we know that it can't be that, for the water makes its way through. Besides, you see it is only three feet wide at the top, and then there is a narrow ledge a couple of feet wide, which was evidently made for the garrison to stand upon and shoot their arrows at anyone attempting to come up the ravine.

Behind the slope is all rough rocks, except just below our feet, where there is a narrow stone staircase of regularly-cut steps. It is so narrow that it could not be noticed by anyone standing here, unless they bent over to look straight down as I am doing. Well, it is just as well that we made the circuit, for we certainly could not have climbed over there."

Another sharp turn, and the ravine ran straight towards the castle.

They hurried on, and when they had gone fifty yards stood at the edge of a roughly circular pit. It was seventy or eighty feet across, narrowing at each end. At one end was the ravine at whose mouth they were standing, and directly opposite, in what might be called the neck of the bottle, stood the Castle of the Demons. It was some fifty feet in width, and as it stood back about forty feet up the neck it could hardly be seen at any point except that at which they were standing.

There was no door or other opening at less than some twenty-five feet from the ground. At that height was a broad aperture about four feet high and twelve wide. Above this were several smaller openings about four feet square. The singular point in the structure was a rough arch of rock, which extended above it and formed its roof. This arch projected thirty or forty feet in front of the building, so that the latter had the appearance of standing in a great cave.

"What an extraordinary-looking place!" Bertie said in a low voice.

"Extraordinary, but how splendidly chosen for concealment! You see the top of the rock above it is level with the ground on either side. This would perfectly well account for people riding along the line of the cliffs, and pa.s.sing over without dreaming that there was a house below them. Even if they went to the edge on this side, they would simply see this deep pit and the ravine beyond, but could not by any possibility obtain a sight of the house unless they came round to nearly where we are standing, which they could have no possible motive for doing.

Besides, you see, all the way we have been pa.s.sing through a thick bush; and I have no doubt that in the old time a wood stood here, possibly planted by the builders of the house. Of course the arch existed before the house was built. The stratum below was probably softer, and the stream gradually trickled through, and perhaps in some great flood, when this basin was full, burst its way out, after which the rock gradually fell until it formed that great natural arch."

"Well, let us go round and have a look at the other side."

They found that the width of the arch to the sea cliff was a hundred and fifty feet.

"If the castle extends to this face, Bertie, it is a hundred feet across, but from here we can't see whether it does so. It is probably built flush, however, as Dias said that it was not noticeable from the sea, and had the arch projected beyond it it could certainly have been seen."

"Well, Harry, if you will tie a rope round my waist you can let me down, and I will have a look at it. You can hold me easily enough if you stand twenty feet back from the edge, and you won't have to pull me up, because I can easily climb up the rope by myself. I need not go down more than thirty or forty feet, and I can do that easily enough."

"Oh, I could pull you up, Bertie."

"Well, you could do that if by any chance I should get tired; then I could give a shout, and you could haul on the rope."

"There are lots of stumps of trees here, Bertie, and I can take half a turn round one of them and so let you down easily; then when you shout I will fasten the rope there and come to the edge, and I can hear whether you want me to haul or not. Of course it must depend whether there are any jagged rocks sticking out. If so, it would be better for you to climb, as the rope might chafe against them if I pulled."

"I understand." Bertie laid down his weapons and water-flask, made a loop at the end of one of the ropes they had brought large enough for him to sit in, then he looked for a spot where the short gra.s.s extended to the very edge. "This is a good place, and the rope won't chafe as it runs over that. Now I am ready. If you will go back to that stump fifteen feet away and let it out gradually, I will be off."

He knelt down, and putting the rope over his head took a firm hold of it just above the loop, and then crawled backwards, his brother keeping the rope taut. "Slack it out gradually now," Bertie said; "I am just over."