They found, however, that there was no possibility of getting out the strips of wood.

"We have only to wait," Percy said. "As soon as they are dry they will be loose." It was, however, two days before the moisture had evaporated sufficiently for them to be able to draw out the wedges.

"Now let us both put our knives in on this side and try and lift it."

Repeated trials showed them that this could not be done. In the evening, however, when the lamp was brought them, they heated the point of one of the knives in the flame until it had so far lost its temper that they were able to bend the point over by pressing it on one of the flags. Again heating it they dipped it in water to harden. They then ground the point down on one of the stones until they were able to pass it down the joint that the action of the wedges had widened. The bent point caught under the stone, and they had no difficulty in raising it.

"There is the first step done," Percy exclaimed in delight. "You had better warm the knife and straighten the point again."

They experienced no great difficulty in getting up the next stone, which they had loosened in a similar way to the first while waiting for the wedges to dry. As soon as this was up they began cutting into the cement. The surface was hard, and the knives at first did little more than scratch it; but below they found it much softer and got on more rapidly. As they removed the cement they placed the powder a handful at a time on the window-sill, and blew it gradually out through the grating. After three nights of continuous work they had made a hole a foot deep and come down upon wooden planking.

"This is doubtless the ceiling of the room underneath," Percy said. "There can be no one sleeping there or they would have heard the scratching overhead." By lifting up the stones, which they always replaced at daybreak, they could hear voices, and did not recommence their work at night till they were well assured that no one was stirring below. As the stones they had taken out were next to the wall, they now commenced operations on the brickwork. This they found much easier, as the mortar was nothing like so hard as the cement, and on cutting it out between the bricks they had no great difficulty in moving these. After two nights' work they had taken them all out with the exception of the outside layer, as they were able to calculate by the thickness of the wall at the window. During the daytime the bricks that had been removed were stowed away in the hole.

"We shall be out to-night," Percy said exultantly, as they replaced the flags for the last time. "This last layer will be easy work, for as soon as we have cut round one brick we shall be able to pull it in, and can then get a hand through the hole, and the others will come quite easily as soon as we cut away the mortar a bit. There will be no occasion to tear up the rugs to make a rope. We are not more than eighteen or twenty feet from the ground, and two or three of them knotted together will be enough. We will set one of the beds over the hole and tie the end to that."

Percy felt nervous all day, being in fear every time he heard a footstep in the passage that something might occur which would upset all their plans. They had now been ten days in their prison, so there was time for a messenger to have gone to Jummoo, and thence to the fortress and back. Still he hoped that his uncle would at any rate refuse to accept Ghoolab Singh's first offer, whatever it might be, and that lengthy negotiations would go on. Nothing out of the ordinary routine happened; their guard came three times a day as usual with their food; and after his last visit Percy sprang from the couch.

"Hurrah! Next time he comes he will find the place empty, Akram. Now let us set to work at once."