They met with equal success on both sides of the rocks, and by evening had caught over forty fish, at least half of which weighed over four pounds. Then they set the long lines, each carrying forty hooks, and returned to the castle with as many fish as they could possibly carry. Maria was delighted with the addition to her larder, and she and José set to work at once to clean and split them. In the morning they were hung in strings from the broad window. Maria said they would get the benefit of the heat from the walls, and any air there might be would be able to pass round them.
By means of the night-lines they caught almost as many fish as they had done with their rods, and that day they had the satisfaction of bringing in more than they could carry in one journey.
"We have got plenty now to keep us going for another three weeks," Harry said, "and we can always replenish our stock when we choose."
Dias returned at sunset carrying one sheep over his shoulders.
"I have left the others out there, señor; I don't think there is any fear of their straying. There is no fresh grass anywhere except near the stream, and moreover, being strange to the valley, they will naturally keep near the mules."
Another month passed in continuous labour. The stones had all been taken up in the basement they had first visited, but no other chamber had been found. The parallel chamber had given them much trouble at starting, as no stone had been found showing any cracks upon it, and they had had to blast one stone to pieces before they could begin to cut up the others. No chamber whatever had been discovered until they were within six feet of the farther end. Then one was found, but it showed no signs whatever of having ever been used. "So far so bad," Harry said when the supper had been eaten almost in silence; "but that is no reason why we should be disheartened. If the Incas buried a treasure they may have thought it prudent to choose some other spot than that used by the old people."
"But where could it be, Harry? You agreed that there was not sufficient depth between the floors for any place of concealment."
"That is so, Bertie, of course. I have been thinking of it a lot during the past few days, when the chances of our finding a treasure under the basement were nearly extinguished. There are still the side walls."
"The side walls!" Bertie repeated. "Surely they are built against the rock?"
"Yes, but we don't know how straight the wall of rock is. You see, they did not build against it at all in the basement, but above that the side walls begin. The rock must have been irregular, and as the walls were built the space behind may have been filled in or may not. When they came to build they may have found that there was a cavern or caverns in the rock—nothing is more likely—and they may have left some sort of entrance to these caverns, either as a place of refuge to the garrison if the place were taken, or as a hiding-place. They might have thought it more secure for this purpose than the underground chamber, which was their general hiding-place. At any rate it is possible, and to-morrow I vote that we have a thorough inspection of the walls of the storeroom below this. That would be the most likely place, for near the sea-level the chances of finding caverns would be much greater than higher up."