"We will bury them when we move the camp down here to-morrow morning," Harry said. "We forgot the two up at that window. That is no matter, we can throw them out to-morrow; they will lie as well at the bottom of the sea as in the earth here."
Not much was said as they returned to the castle. They had been a very silent party all day. The gloom and darkness, the way in which their voices echoed in the empty hall, had exercised a depressing effect on them; and Donna Maria, generally the most talkative of the party, had not quite recovered from the shock which the exit of the bats had given her. It was not until she had cooked a meal, and they all sat down to it, that they quite recovered their spirits. They had found José awaiting their return. He had a blazing fire, having brought down as much firewood as he could carry, and Dias had briefly told him the result of their explorations.
"Well, Harry, what do you think altogether?" Bertie asked after the meal was over.
"I think we ought to be very well satisfied," he replied. "Everything has borne out the ideas we had. The castle may have been built as a fortress by some great chief, certainly before the time of the Incas, or it may have been used for a prison. The ornaments and things we found showed that it was known to the Incas. They would have had no occasion to use it when they were undisputed masters of the country, but when the troubles came with the Spaniards a garrison was placed here, and possibly some of their chiefs took refuge in the place. Then came the time when all opposition to the invaders ceased, and only a small body of men were left here to guard the secret, and the treasure if there were any. Generations may have passed before the last of the garrison died of hunger, and probably all others who were in the secret fell in some insurrection or died in the mines. All this seems plain enough, except that possibly there was no treasure. That left by the Chimoos may have been discovered by the Incas. I should think it extremely likely that the ship Dias mentioned as setting out with a large amount of treasure was intended to land its stores here.
"It may have done so, or it may have sunk at sea. I am inclined to think that it was lost, because the traditions concerning these hidden treasures seem to be extremely accurate; and yet, as Dias says, none tell of any Inca treasure being concealed here. However, it is quite possible that the treasure did come here and was landed, and that the ship was then broken up, so that it might be supposed she was lost at sea, and that this was kept so profound a secret by the men here, that the news was never generally known even among the natives. So far our search to-day has been successful, but I see that a hunt for the treasure will be a very difficult one. Certainly in the upper chambers there doesn't appear any possibility of such a hiding-place existing. The whole space is accounted for. The walls are all of solid stone, and have no special thickness. If the roofs had been arched there might be empty spaces on each side of the spring of the arch, but they are supported by pillars or walls, with only just space between the floors for the beams of solid stone. Of course it is in the lowest room that one would expect to find hiding-places like those we saw at Pachacamac." He paused.
"Well, why should they not be there, Harry?"
"Because, as we saw, the floor is at most twelve inches above the water-level. How is it possible that they could have constructed chambers below that level, that is in the bed of a torrent? It is probable that the solid rock lies many feet below the bed of the stream. A portion of that great arch must from time to time have fallen into it; and it may be that the river once ran forty or fifty feet below its present level. In all the places that we have seen these treasure chambers were formed in solid adobe foundations, as the temples always stood on artificial terraces. With all our appliances at the present time it would be next to impossible to sink in a stratum of great rock fragments below the water level, and I do not believe that the old people here could have done so even had it been a solid rock. The difficulties of excavating chambers in it would have been enormous. They could split rocks with the grain, and all the stone walls we have seen were made of regular pieces, and evidently formed of stone so split. They were able to give them a sort of facing with great labour, but the tools they had were not made of material hard enough to work in solid rock, and the labour of excavating such chambers would have been stupendous. Therefore I am at a loss to imagine where any such chambers can be in that castle."
Dias nodded gravely. He had been with travellers who had done a great deal of excavation, and he was able to understand Harry's argument. Maria, who was listening attentively, also understood it. José simply rolled cigarettes and smoked them. It was a matter for his elders, and he did not even try to follow what Harry was saying. There was some minutes' silence, and then Bertie said, "But the floors are all even."
"What do you mean, Bertie?" Harry asked in a puzzled tone.
"I mean, Harry, that they run straight along. There is no dip in them."