"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."
They descended to the first floor. They found that the space behind the great room was divided into a number of chambers. All of these, with the exception of the small one on the sea-face, were necessarily in absolute darkness, and in all were brackets for torches, similar to those in the principal chamber. Bertie counted them, and found that, including those first met with, they numbered one hundred and twenty-three.
"How much do you think they weigh apiece?" he asked Harry when the tour was finished.
"I have not the slightest idea, Bertie. I should think about fifteen pounds, but it may be five pounds less than that. They would certainly give a very nasty knock on the head."
"Oh, I was not thinking of knocks on the head. If there are a hundred bars at fifteen pounds apiece, it is a big amount of silver; if they are only ten pounds each—and really I think that is nearer the mark—they weigh a thousand pounds. What is silver worth a pound?"
"It varies. You can put it at five shillings an ounce; that would be three pounds sterling for one of silver—three thousand pounds in a rough calculation for the lot."