It was too dark to see her watch, but Ulyth knew it must be nearly one o'clock. She hastily donned the warm garments ordered to be worn by sentries, and hurried away to relieve Helen Cooper. Her post was at the west end of the camp, where the field merged into a rushy swamp before it rose into the hill that led towards the farm. "The password is 'Louvain'," said Helen, retiring, not at all sorry to seek the comfort of her bed. "One leg of the camp-stool is most rickety, so I warn you not to lean too hard on it. Good night." Left alone, Ulyth sat down with extreme caution on the deficient camp-stool and surveyed the situation. There were clouds across a waning moon, and it was fairly dark. She could see the outlines of the tents in black masses behind her; in front the field lay dim and shadowy, with a mist creeping from the water. Up above, to her right, against an indigo sky, the Great Bear was standing almost on its head, with its tail in the air. One of the tests of a Torch-bearer was a knowledge of the stars, and Ulyth had learnt how to tell the time by the position of this particular constellation. She made a rapid calculation now, reckoning from the day of the month, and was glad to find it came out correctly. Cassiopeia's white arms were hidden by the mountains, but the Milky Way shimmered in the east, and overhead Arcturus blazed as he had done in the days when the patriarch Job recorded his brilliance. To the extreme north a patch of light lay behind Penllwyd, where the sun, at this season hardly dipping far out of sight, worked his course round to the east again. How quiet it was! The silence was almost oppressive. The gentle lap of the tiny waves on the lake was not equal to the rush of the stream at The Woodlands. Not even a night-bird called. The camp was absolutely still and slumbering. Ulyth rose and paced about for a while. It was too cold to sit still long. She must only use the camp-stool when she needed a rest. "Sentries ought to be allowed chocolates," she murmured, "or hot peppermints, just to keep up their spirits. Ugh! How weird and eerie it all is! There isn't a sound anywhere. It's not an enlivening performance to keep watch, I must say." She stopped, suddenly on the alert. What was that noise in the darkness to her left? She distinctly heard a rustle among the gorse-bushes, and thought something moved in the deep shadow. "Halt! Who goes there?" she challenged.