Directly afterwards his shoulders disappeared. Harry let the rope slowly out until he calculated that fifty feet were over the cliff, then he fastened it very securely round the stump and went forward to the edge.

"Are you all right, Bertie?" he shouted.

"Quite right."

The face of the rock was very even, and there was nothing for the rope to chafe against. Harry lay down at the edge, keeping a firm hold of the rope to prevent himself from slipping over, and was able to look down on Bertie.

"Well, Bertie, what is it?"

"It is the wall of the house, I have no doubt, but it is so cleverly built that I can scarcely see where the arch ends and the house begins.

Looking quite close I can see where the stones join, but their face has been left rough; and as it is just the same colour as the rocks, and lines have been cut down its face, and cracks made across it answering to the lines in the rock on both sides, I am sure I should not have known it was built up unless I had examined it. It is much narrower on this side than on the other--not more than twenty-five feet, I should say. There seem to be some irregularly-shaped holes in what looks like a fissure in the middle. I suppose they are to light the rooms on this side of the house, but they are certainly too small to be noticed from the sea."

"Does the sea come right up to the foot of the cliff?"

It was a minute before the answer came. "The water comes to the foot, but there is a line of rocks running along forty or fifty feet farther out. Some of them seem to be thirty feet out of the water; at one end they touch the cliff, and at the other there is a free pa.s.sage. The water is very clear, but as far as I can judge I should say there is a depth of a fathom or a fathom and a half between the rocks and the cliff. Certainly a boat could row in to a position underneath where I am."

"Is there anything more?"

"No."

"You don't see an entrance down here?"

"No."

"All right! Then you may as well come up again. Can you climb up?"

"Easily."

"Well, hail me if you want me to haul."

Harry went back to the stump, unwound the rope until it was only half a turn round it, and then, holding it firmly, stood ready to haul up.

CHAPTER XV

INVESTIGATIONS

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 sh.o.r.e. 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 pa.s.sage 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."

[Ill.u.s.tration: 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 pa.s.s 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 princ.i.p.al 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 pa.s.sed 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 pa.s.sage 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 s.p.a.ce 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 pa.s.sage. 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 pa.s.sage sloped downwards, and when they had gone some fifty feet their progress was arrested by water which appeared of a deep-blue colour.