"That I can't tell you, Dias, and it is of no use trying to guess now. First of all, we will get the rest of the stone up. It won't be difficult, for now that we have made a start we can use our crowbars. José, run up and tell my brother to come down. We shall want him to help with the crowbar; and besides, he would, of course, wish to be here, now that we are on the point of making a discovery one way or the other."
In a minute Bertie came down with José, and Donna Maria followed. "José tells me you have broken a hole in one of the stones," Bertie exclaimed as he ran up.
"We have got a bit out of a broken stone, Bertie. This stone had been broken before, and evidently not by accident. It is only half the thickness of the others, and, as you can see, there is another slab underneath."
"Who can have broken it, Harry?"
"That question we cannot decide, but I should say probably the Incas. We agreed that it was very possible they discovered the hidden treasures of the Chimoos. They must have learned, as the Spaniards did, how cleverly these places were hidden, and it must have been as evident to them as it is to us, that if there was a hiding-place here, this must be the spot."
When one or two more pieces of the stone had been got out by the aid of crowbars, the rest was removed without the least difficulty. Another slab two feet square was exposed. In the middle of this was a copper ring, and the slab fitted, into a stone casing about eighteen inches wide. As soon as this casing was cleared, Dias and José took their places on one side, the two brothers on the other. A crowbar was thrust through the ring, and all of them, taking hold of the ends, lifted with all their strength. At first the stone did not move, but at the second effort it lifted suddenly. It was the same thickness as the one they had broken, and, on being moved, was easily handled. The torches were thrust down, and all peered eagerly into the vault. So far as they could see it was empty.
"Shall I jump down, señor?'
"No, the air may be bad, José. Run up and bring down a short length of rope, twenty feet will be ample. Now, let your torch drop down, Dias. If it burns, it will be safe for us to go down; if not, we must keep on dropping blazing brands into it till they burn."
As, however, the torch burnt brightly, Harry lay down, and, saying, "Hold my legs, Bertie!" looked down into the vault. Eighteen inches below the surface, the hole widened out suddenly. A minute later Harry's head appeared above the surface again.
"It is empty," he said in as cheerful a voice as he could manage. "Of course it is a disappointment," he went on, "but I felt certain that it would be so directly we found the stone was cracked. The only hope was that the first finders of the treasure afterwards used the place for the same purpose. That they thought it possible they might do so is clear by the care with which they fitted the stones together."