In the mean time everything was solid and safe beneath her feet. The tower stood strong, the pavement of the narrow platform which surrounded it was worn by time and weather, but perfectly secure. Here and there a breach in the balustrade showed like fantastic flamboyant work, but a regiment might have marched round it without disturbing a stone. Oona's excitement was extreme. Her heart beat in her ears like the roaring of a torrent. She went on, raised beyond herself, with a strange conviction that there was some object in her coming, and that this which seemed so accidental was no accident at all, but perhaps--how could she tell?--an ordeal, the first step in that career which she had accepted. She put her hand upon the wall, and guided herself by it, feeling a support in the rough and time-worn surface, the stones which had borne the assault of ages. Daylight was still bright around her, the last rays of the sun dazzling the loch below, which in its turn lent a glory of reflection to the sky above, and sent up a golden sheen through the air from the blaze upon the water. Round the corner of the tower the wind blew freshly in her face from the hills, reviving and encouraging her. Nature was on her side in all its frankness and reality whatever mystery might be elsewhere. When she had turned the corner of the tower, and saw beneath her the roofs of Auchnasheen visible among the trees, Oona suddenly stood still, her heart making, she thought, a pause as well as her feet; then with a bound beginning again in louder and louder pulsation. She had come to a doorway deep set in the wall, like the entrance of a cavern, with one broad, much-worn step, and a heavy old door bound and studded with iron. She stood for a moment uncertain, trembling, with a sense of the unforeseen and extraordinary which flew to her brain--a bewildering pang of sensation. For a moment she hesitated what to do: yet scarcely for a moment, since by this time she began to feel the force of an impulse which did not seem her own, and which she had no strength to resist. The door was slightly ajar, and pushing it open, Oona found herself, with another suffocating pause, then bound, of her heart, upon the threshold of a richly furnished room. She was aware of keeping her hold upon the door with a terrifying anticipation of hearing it close upon her, but otherwise seemed to herself to have passed beyond her own control and consciousness, and to be aware only of the wonderful scene before her. The room was lighted from an opening in the roof, which showed in the upper part the rough stone of the walls in great blocks, rudely hewn, contrasting strangely with the heavy curtains with which they were hung round below. The curtains seemed of velvet, with panels of tapestry in dim designs here and there: the floor was covered with thick and soft carpets. A great telescope occupied a place in the centre of the room, and various fine instruments, some looking like