Harry was relieved when, a few minutes later, Bertie's head appeared above the edge, and directly afterwards he crawled over. "My arms have strengthened ever so much with our work. I could have done it before, but it would have been hard work."  
"Well, so far so good, Bertie. There is no doubt that it is one of the best hiding-places in the world, and I am not a bit surprised that the Spaniards never found it. Now we will go back to the edge of the ravine and have a good look from that side."
 
As they went along he said, "Let us have a look at these bushes, Bertie. The soil is very thin about here, and I wonder that the trees grew."
 
"These are pines," Bertie said, "and in the mountains we often saw pines growing among rocks where there did not seem a handful of soil for them."
 
On examining they found several old stumps, and thrusting a ramrod down Harry found, to his surprise, that the soil was from three to four feet deep. He tried again a little farther off, and found that it was two feet; further still, it was only one.
 
"The tree must have stood in a hole in the rock," he said. "Try another one, Bertie." The same results were obtained. "That explains it, Bert. Evidently when they planted the trees to prevent this place from being seen from the hills, they cut away the rock in circles about twelve feet across and made cup-shaped holes, which they filled up with earth. When they planted the young trees I dare say at first they watered them. They could easily enough fetch water up from the stream. When the trees got fairly rooted they would be able to leave them alone, perhaps giving them a good watering once every two or three months. Whenever the rains came they would be able to give up watering altogether, for in these basins the earth would keep moist for a very long time. It would be a big job, but no doubt the king who built the place had all his tribe at work on it. It is probable that the Incas had established themselves at Cuzco for many years before they came down to this place, and the trees may not have been planted till their coming was first heard of. In that case there would be plenty of time to hide the place before they came down and searched the shore. We know that the Chimoos resisted them for a considerable time before they were finally conquered. Well, for whatever purpose this place was built it is one in which either the Chimoos or the Incas, if they ever found the place, would be likely to hide treasure, which is satisfactory. Now we will sit down here for a short time and watch both windows. You look at the two top lines, Bertie, and I will look at the two lower lines. I certainly do not see any signs of life. That is how the water gets out," and he pointed to a roughly-shaped arch about twelve feet wide and as many high. Through this the little stream disappeared. "I expect there is a similar passage at the other end."
 
"There may have been," Bertie said. "I was hanging so close to the wall that there may very well have been one without my being able to see it. But it looks pitch-dark in there. If there were much of an opening we ought to see the light, for, as we agreed, it can't be more than a hundred feet long."
 
[Image: HARRY DROPPED THE BARREL OF HIS RIFLE INTO THE PALM OF HIS LEFT HAND.]
 
"That is the first place we will investigate, Bertie. The question of how we are to get into the house wants some thinking over. That lowest window is a good twenty-five feet above the ground."
 
"Of course if we had a grapnel we could fasten it to the end of a rope and chuck it in."
 
"We shall have to make something of that sort. If the window had been on the other side instead of this it would have been easy enough, because I could have lowered you and slipped down the rope afterwards, but that arch sticking out so far on this side makes it impossible. All that we can do now is, as far as I can see, to lower ourselves down on to the top of that wall in the ravine, then go and examine the tunnel. We have got plenty of rope to lower ourselves from here on to the wall."
 
They watched the building for another twenty minutes. "I am convinced that no one is there," Harry said. "I have not seen as much as a shadow pass any of the windows since. If people did live in it they would naturally be on this side of the house, because the rooms here are better lighted and more cheerful, and no doubt they are the principal rooms, as the house narrows so much at the other end."
 
"Well, let us try it," Bertie said. "If there is a strong force here we should only have to make a bolt back to that narrow staircase. We could hold that against a whole tribe."
 
They rose and walked along the edge of the ravine till they were above the wall, then, fastening the rope to a stump, they slid down on to it.
 
"So far so good," Harry said, as, holding their rifles in their hands, they went down the steps. Then he suddenly stopped. "Hullo," he exclaimed, "here are two skeletons!"
 
They were not quite skeletons, for the bones were covered by a parchment-like skin, and there were still remains of the short skirt each had worn in life. A spear lay beside each. With difficulty the brothers passed down without treading upon them.
 
"They must have been here a long time, Harry," Bertie said when they got to the bottom.
 
"Any time," the other said. "In the dry air of these low lands there is scarce any decay. You remember those mummies we saw. I believe iron or steel will lie here for years without rusting. They may have been here for a couple of hundred years or more."
 
"I wonder what killed them, Harry?"
 
"I have no idea. You see, one was lying almost on the other with his arms round his body, as if he had died trying to lift him up. If they had been shot by arrows they would still be sticking into them; if they had been killed by people pursuing them they would probably be lying upon their backs, for they would naturally have faced round at the last moment to resist their pursuers, whereas there are no signs of injury. This settles the point that there is no one in the house. Had it been inhabited, the bodies would have been removed from the path, for it is by this that people would go out and return. There may have been a ladder down from the wall; the only other way they could have got out would have been through that passage to the sea. A boat may have been kept there; but even if that had been so, we should scarcely have found those bodies on the steps. Well, we shall have plenty of time to talk over that."
 
They walked across the open space until they approached the building. For a height of twenty feet it was constructed of stone, above that it appeared to be made of the great adobe bricks which had been so largely used at Pachacamac, and in others of the old ruins they had seen.
 
"There is no question that it must have been built by the Chimoos or some race before them," Harry said; "the Incas could have had no possible reason for erecting such a place. Well, now for the tunnel."
 
The little stream only occupied two feet of the passage. They were therefore enabled to walk down dry-foot.
 
"We ought to have brought a torch with us," Bertie said.
 
"I don't think we shall want that; there is a sort of thin blue light, the reflection of the light upon the water outside, though I don't know why it should be so blue."
 
The reason was soon manifest. The passage sloped downwards, and when they had gone some fifty feet their progress was arrested by water which appeared of a deep-blue colour.
 
"That is it," Harry said. "You see the roof comes down into the water twenty feet off, and the light has come up under it. They sloped this passage to make the water flow out below the surface of the sea, so that the opening could not be seen from without. By the light I should not say that the opening is more than six inches under the water. I don't know how the tides are, but if it is high tide now, the top of the opening would be eighteen inches out of water at low tide, for, as you know, the tide only rises about two feet on this coast. In that case a boat would be able to come in and out at low tide, but of course a man wanting to come in or go out could easily dive under at any time. Well, that settles that point for the present. It was a clever plan; any amount of water could flow out in flood time, and yet no one who took the trouble to come behind that ledge of rocks we saw would have any idea that there was an opening. I think now that we had better go back, Bertie; in the first place because we can do nothing until we have manufactured a grapnel of some sort, and in the next place because every moment we delay will add to the anxiety of our friends in camp. We must have been away three hours, I should say."
 
They ascended the steps, fastened the short rope round a block at the top of the wall across the ravine, and lowered themselves down. They had to proceed with great care while making their way down the slope composed of rough and jagged rocks, Once at the bottom of the ravine, however, they walked briskly on. They had scarcely issued from the entrance when they saw a stir in the camp in the distance and heard a shout of delight, and then Dias dashed off to meet them at the top of his speed.
 
"Thanks to all the saints, se?or, that you are safe! You do not know how we have suffered. We have prayed ever since you started, all of us. Once or twice I threw myself down in despair, but Maria chided me for having so little faith in God to keep you from evil, and cheered me by saying that had harm come to you we should assuredly have heard the sound of your guns. Have you been in the castle?"
 
"No, Dias, we have not been in—for the good reason that we could not get in, because the only entrance is fully twenty-five feet from the ground. We cannot enter until we have made some contrivance by which a rope can be fixed there, or manufactured a ladder, which would be the best way and save a lot of trouble, if we could get a couple of poles long enough. We thought that we would come back when we had seen all there was to be seen outside the place."
 
The Indian's face fell. "Then you do not know what is in the house, se?or?"
 
"No; but we are certain that there is no one there, and that probably no one has been there for the past two hundred years, and perhaps a good deal longer."
 
"And the demons have not interfered with you?"
 
"The demons knew better," Bertie laughed.
 
"They may not be powerful in the daytime," Dias said in an awed tone. "It is at night that they would be terrible."
 
"Well, Dias," Bertie said, "everyone knows that the demons cannot withstand the sign of the cross. All you have to do is to make a small cross, hold it up in front of you and say, 'Vade retro, Satanas!' and they will fly howling away."
 
"Seriously," Harry said, "you know it is all bosh about demons, Dias."
 
"But the church exorcises evil spirits. I have seen a priest go with candles and incense to a haunted house, and drive out the evil spirits there."
 
"That is to say, Dias, no spirits were ever seen there afterwards, and we may be very certain that no spirits were ever seen there before, though cowardly people might have fancied they saw them. However, to-morrow we shall get inside, and Bertie and I will stop there all night, and if we neither see nor hear anything of them you may be quite sure that there are none there."
 
"But the traditions say they have strangled many and torn them, se?or; their bodies have been found in the daytime and carried off."
 
"It is quite possible that they were strangled and torn there, but you may be sure that it was the work not of demons, but of the men who were set to guard the place from intruders. Well, those men have gone. We found two skeletons, which must have been there at least a hundred years, perhaps a great deal more. They were lying on the stairs, the only way of getting into the place, and they would have been removed long ago if anyone had been passing in or out."
 
By this time they had arrived at the camp. "I knew you would come back all safe, se?ors," Donna Maria said triumphantly; "I told Dias so over and over again. But what have you seen?"
 
"I see something now—or rather I don't see something now that I should like to see," Bertie laughed. "I thought you would have got a good dinner ready for me, but I do not see any signs of its being even begun."
 
The woman laughed. "I have been too busy praying, se?or, and have been keeping up Dias's spirits. I never knew him faint-hearted before, and it really almost frightened me; but I will set about getting dinner at once."
 
"No, no," Harry said; "we are really not hungry. We had a good meal before we started. So do you three sit down and I will tell you all we have seen."
 
The three natives listened with intense interest. When he had done, Maria clapped her hands. "It must be a wonderful place," she said. "I wish I had gone with you, I will go to-morrow if you will take me."
 
"Certainly we will take you, Maria; and I have no doubt that Dias will go too."
 
"I will go as far as the place," said Dias, "but I will not promise to go in."
 
"I won't press you, Dias. When we have slept there a night I have no doubt you will become convinced that it is quite safe. And now about the ladder. We shall really want two to be comfortable—one for getting up to the window, that must be made of wood; the other, which will be used for getting up and down the wall in the ravine, may be made of ropes. But I think that that had best be hung from the top of the ravine above it, so as to avoid having to climb over those rough stones at the foot, which are really very awkward. One might very well twist one's ankle among them."
 
"I will go at once, se?or, and get the poles," Dias said. "You may as well come with me, José. We passed a wood in the valley about five miles off; there we can cut down a couple of young trees. If we put the saddles on two of the riding mules, when we have got the poles clear we can fasten the ends to ropes and trail them behind us."
 
"We shall also want some of the branches you cut off, Dias. You had better say thirty lengths of about two feet long, so that we may place the rungs nine inches apart. You had better get poles thirty feet long, for we may not have just the height by a couple of feet."
 
The two natives at once rode off, and the brothers set to work to collect sticks for the fire.
 
"It is too bad, se?ors, that this should not have been done while you were away, but we thought of nothing but your danger."
 
"You were perfectly right, Maria; if we were in peril, you did the best thing of all to obtain help for us. As to the dinner, there is no hurry whatever for it. What have you got to eat?"
 
"There is nothing, se?or, but a few of the fish we fried two days ago, and the ham that we smoked of that bear."
 
"I will take the line, then, and go down and try to catch some fresh fish," Bertie said. "There is a good-sized pool about half-way between here and the ravine. I might get some fish there."
 
"I will take my gun, Bertie, and go up to the bushes by the ravine, and see if I can get a bird or two. There is no other shelter anywhere about here."
 
In half an hour the lad brought a dozen fish into the camp. None of them were above half a pound, but they were nearly of a size.
 
"These will be very nice," the woman said with a smile as he handed them to her. "I have thrown away the others. I do not think we dried them enough; they were certainly going bad. I have heard your brother fire several times, and as he does not often miss, I have no doubt he will bring us something."
 
Twenty minutes later Harry was seen coming along. When he arrived he threw down a large bunch of wild pigeons.
 
"There are ten brace," he said. "That will give us four apiece. I found nothing in the bushes, but I suddenly remembered that when we went across from the ravine to the house, lots of wild pigeons rose from the sides of the rocks. We did not give them a thought at the time, our attention being fixed upon the building. But when I got nothing above, I suddenly remembered them, and concluded that they had their nests in the crannies of the rocks. So I walked along to the top, and as I did so numbers of them flew up. I shot a couple; most of the others soon settled again, but some kept flying round and round, and in ten minutes I got as many as I wanted. Then of course I had to go down into the ravine by the rope and the steps to gather them up. I returned the way we did, by the rope we had left hanging from the top of the wall."
 
Maria was already at work on the birds. Taking them by the legs, she dipped them for a minute into a pot of boiling water, and as she took them out Bertie pulled off the feathers. Then she cut off the heads and feet, cleaned them, and spitted them on José's ramrod, and, raking out a line of embers from the fire, laid the ends of the ramrod on two forked twigs while she attended to the fish.
 
"But they will be done before the others arrive," Bertie said.
 
"No, se?or; there they come! They will be here in a quarter of an hour. The cakes are ready and hot, so we will lay the pigeons on them, and they will be nicely flavoure............