On this night there was no moon. It was as black as pitch. It is always unpleasant to be on sentry-go on such a night. The mind wanders, in spite of all effort to check it, through a long series of all the ghastly stories one has ever read. There is one in particular of Conan Doyle's about a mummy that came to life and chased people on lonely roads--but enough! However courageous one may be, it is difficult not to speculate on the possible horrors which may spring out on one from the darkness. That feeling that there is somebody--or something--just behind one can only be experienced in all its force by a sentry on an inky night at camp. And the thought that, of all the hundreds there, he and two others are the only ones awake, puts a sort of finishing touch to the unpleasantness of the situation. Kennedy was not a particularly imaginative youth, but he looked forward with no little eagerness to the time when he should be relieved. It would be a relief in two senses of the word. His beat included that side of the camp which faces the road to Aldershot. Between camp and this road is a ditch and a wood. After he had been on duty for an hour this wood began to suggest a variety of possibilities, all grim. The ditch, too, was not without associations. It was into this that Private Jones had been hurled on a certain memorable occasion. Such a thing was not likely to happen again in the same week, and, even if it did, Kennedy flattered himself that he would have more to say in the matter than Private Jones had had; but nevertheless he kept a careful eye in that direction whenever his beat took him along the ditch. It was about half-past twelve, and he had entered upon the last section of his two hours, when Kennedy distinctly heard footsteps in the wood. He had heard so many mysterious sounds since his patrol began at eleven o'clock that at first he was inclined to attribute this to imagination. But a crackle of dead branches and the sound of soft breathing convinced him that this was the real thing for once, and that, as a sentry of the Public Schools' Camp on duty, it behoved him to challenge the unknown. He stopped and waited, peering into the darkness in a futile endeavour to catch a glimpse of his man. But the night was too black for the keenest eye to penetrate it. A slight thud put him on the right track. It showed him two things; first, that the unknown had dropped into the ditch, and, secondly, that he was a camp man returning to his tent after an illegal prowl about the town at lights-out. Nobody save one belonging to the camp would have cause to cross the ditch. Besides, the man walked warily, as one not ignorant of the danger of sentries. The unknown had crawled out of the ditch now. As luck would have it he had chosen a spot immediately opposite to where Kennedy stood. Now that he was nearer Kennedy could see the vague outline of him. "Who goes there?" he said.