The Treasure of the Incas: A Story of Adventure in Peru by G. A. Henty (reading list TXT) 📖

the water than it did higher up, and they were able to walk out till they came to the point where the roof dipped into the water. They dived, and in a few strokes came up beyond the roof.

"This is glorious!" Bertie said. "We have often bathed in pools, but this is a different thing altogether. It is more than a year since we had our last dip in the sea, the day we arrived at Callao."

Although there was little or no wind, the rollers were breaking on the line of rocks outside, pouring over the lower points in volumes of foam, and coming in broken waves up the passage.

"We mustn't go beyond the point, Bertie, or we may be dashed against the foot of the cliff. We will climb up that rock to the left; it is not too steep, and I think we can manage it. From there we shall get a good view of this side of the house and of the situation in general."

It required considerable care to climb the rocks, and more than once they hurt their feet on sharp projections. The top of the rock, however, was smooth by the action of time and sea, and they were able to sit down on it in comfort.

"The castle is just as you described it, Bertie; and certainly no one sailing past, however close he came outside these rocks, would be able to detect it. No doubt the stone of which it is built is the same as that of the cliffs. Most likely it was taken from the ravine where the passage now is, and had fallen from the arch above. It might have been more noticeable at first, but now it is weathered into exactly the same tint as the cliffs. The openings are very dodgily placed, and a stranger would not dream that they went many inches in. Now, from where we stand we can look up into that curious opening on the top story. I have been puzzling over that ever since I saw it, but can't think of any possible reason for its having been cut like that, except to enable them to throw stones on to any boat that came into this passage behind the rocks; and yet that can hardly have been the case, for, as I remarked, there are no stones piled up there. Certainly they had a very large number of arrows, but stones would be very much more useful than arrows against a boat almost under their feet. However, that does not concern us now. This line of rocks must greatly aid in hiding the house from the sea. They are higher than you thought they were, looking down at them from above. We are quite thirty feet above the water, and at two or three points they are at least ten or twelve feet higher. Of course a short way out no one would be able to see that they were detached from the cliff, or that there was any passage whatever behind them.

"Besides, they break the force of the waves. If it was not for them it would be impossible for any boat to come up close to the face of the house, and a heavy storm might even break down the wall altogether. A tremendous sea would roll in here in a westerly gale; and if it hadn't been for these rocks it would have been necessary to build the lower part of the house absolutely solid to resist the sea. It is possible that the rocks were higher than they now are when the place was first constructed, in which case the house might have been almost entirely hidden from sight. Well, we may as well go back again, Bertie; we know all there is to be known about this side."

They swam back into the tunnel, dressed, and went out.

"We have come out, Maria," Bertie called. "The coast is clear for you. The water is not so deep as we thought it was, and you can walk out to the point where the roof comes down on to the water without getting out of your depth."

It did not take them long to cut a number of switches to serve as brooms, and a couple of handles. They carried them up into the house, and lashed the switches firmly on to the handles. The work was rough, but the brooms when completed were large, and, although not strong enough for heavy work, would do well to sweep aside the thin layer of almost impalpable dust on the floor below.

"Shall we take wood down there, Harry?"

"No; I think a fire would be a drawback rather than an assistance. It would be very valuable if we were working at one spot, but it could give no general light in a place a hundred feet long. We will take a torch down, and hold it and sweep by turns. We shall only want, to begin with, to make a clear path a couple of feet wide down the middle. Of course later on we shall clear it all. That will be sufficient to enable us to see how the floor is constructed, whether with big blocks or small ones, how closely they are fitted together, and so on. It is certainly unlikely that we shall find any indication as to where chambers exist."

It took but a very short time to clear the path; the dust was so light that one sweep of the broom cleared it away. When they got to the farther end they returned to examine the floor. For four or five feet from the cistern the rock had been evidently untouched, except to cut off any projecting points. Then there was a clear line running across the path. Bertie held the torch down close to it. Harry knelt down and examined it.

"This is a clean cut, Bertie. It is evidently solid above this, but the stone is not quite the same colour on each side of it, and it looks as if they had cut away the rock here and begun to build so as to keep the floor level. The cut may be six inches deep and it may be a foot, that doesn't matter. The face of this stone is very smooth, but it is not cut; it is, I think, the face of the natural fracture. Move the torch along and let us see where the next join is. Ah, here it is!"

The slab was four feet across.

"You had better sweep the dust off both ways, Bertie, so that we may see what size it is."

It was, they found, about eight feet long.

"It has straight edges, Harry, almost as straight as if it had been sawn."

"Very likely it was sawn, Bertie; They could have had no tools that would cut a hard stone like this regularly, but as they were certainly clever builders they must have employed some means to do it. Possibly they used a saw without teeth, for however much they might have hardened the copper, the teeth could not have stood, but if they had a hard copper band fixed like the saw some masons use, and kept the stone moistened with fine sand, they might have cut into it. Of course it would have been a slow process; but they would not have needed to go far into the stone, for when they got down two or three inches they might have broken it through by dropping a heavy weight on the end. It would not have mattered if the fracture had not been straight below the cut, for only on the surface would they have wanted to fit accurately to the next stone. In another way they might have got a straight edge, that is, by driving very dry wedges into the cut made by the saw, and then moistening them. I know that great stones can be split in that way. They