"I expect this is the room where the married troops lived and slept," Harry said; "there is not much to see here."
The two stories above were exactly similar, except that there were no remains of dividing mats nor of female ornaments. They walked to the narrow end. Here the opening for light was of a different shape from those in the rooms below. It had apparently been originally of the same shape, but had been altered. In the middle it was, like the others, three feet high and six inches wide, but a foot from the bottom there was a wide cut, a foot high and three feet wide. As they approached it Dias gave an exclamation of surprise. Two skeletons lay below it. "They must have been on watch here, señor, when they died," he said as they came up to them.
"It is a rum place to watch," Bertie said, "for you cannot see out."
"You are right, Bertie, it is a curious hole."
The wall was over two feet thick; all the other openings had been driven straight through it, and, as they had noticed, were doubtless made in the stones before they were placed there, for inside they were cleanly cut, and it was only within three inches of the outer face that the edges had been left rough. This opening was of quite a different character. It sloped at a sharp angle, and no view of the open sea could be obtained, but only one of the line of rocks at the foot of the cliffs. It was roughly made, and by the marks of tools, probably of hardened copper, it had evidently been cut from the inside.
Harry stood looking for some time. "I cannot understand their cutting the hole like this. It could not be noticed from the sea that there was an opening at all; that is plain enough. But why make the hole at all when you can see nothing from it? And yet a watch has been placed here, while there was none at the other places where they could make out any passing ship."
"Perhaps," Bertie said, "it was done in order that if from the other places boats were seen approaching, they could chuck big stones down from here and sink any boat that might row inside the rocks into the entrance to the passage, which, as this is in the middle of the room, must be just under us."
"In that case they would have kept a supply of big stones here. I have no doubt whatever that it was made some time after the castle was built, and I should say, judging by its unfinished state, the work was done in haste. But what for, goodness only knows. Well now, having made no discoveries whatever on the upper floor, we will go down. It is certain that there can be no great treasure hidden under any of these floors, there is not depth enough for hiding-places. I counted the steps as we came upstairs, and there cannot be much more than two feet between the floor of one room and the ceiling in the next. I fancy that this is of single stones, each the flooring length of the space between the half-walls. You see that there is a long beam of stone running on the top of the dividing wall, and the ends of these stones appear to rest on it. It is below that we must look for hiding-places."