"But there were birds too, Dias."

"Yes, I expect they were nearer. Perhaps some of them were in the other rooms, where they would be close to the openings. But they were probably scared too by the noise of the bats, and as the windows behind were too small for them all to fly out together, they made for the light instead."

"Well, now, let us start," Harry said, getting up. They again lit their torches, and this time found everything perfectly quiet in the passage. Two or three yards beyond the spot at which they had before arrived they saw a staircase to the left. It was faintly lighted from above, and, mounting it, they found themselves in a room extending over the whole width and depth of the house. The roof at the eastern end was not supported by pillars, but by walls three feet wide and seven or eight feet apart. The first line of these was evidently over the wall of the room they had left. There were four lines of similar supports erected, they had no doubt, over the walls of rooms below. The light from the four windows in front, and from an irregular opening at the other end some three feet high and six inches wide, afforded sufficient light for them to move about without difficulty. There were many signs of human habitation here. Along the sides were the remains of mats, which had apparently divided spaces six feet wide into small apartments. Turning these over they found many trifles--arrow-heads, bead-necklaces, fragments of pots, and even a child's doll.