The boy was an apt pupil, and at the end of twenty minutes had mastered it sufficiently to be able to make fair progress through the water. He would have kept on practising, but Jack stopped him. “We’ve been in long enough,” he said; “you mustn’t overdo it. Come along, Reddy,” he called to that worthy, who was disporting himself out in the middle of the current. As they turned toward the shore the full moon peeped suddenly over a little hill on the eastern horizon, and cast a broad stream of silver light across the water, touching every ripple and little wave with magic beauty. “Oh, look!” cried Allan. “Look!” They stood and watched the moon until it sailed proudly above the hill, and then waded to the bank, rubbed themselves down briskly, and resumed their clothes, cleansed and purified in spirit as well as body. They made their way back through the corn-field, but just as they reached the embankment, Reddy stopped them with a quick, stifled cry. “Whist!” he said, hoarsely. “Look there! What’s that?” Straining his eyes through the darkness, Allan saw, far down the track ahead of them, a dim, white figure. It seemed to be going through some sort of pantomime, waving its arms wildly above its head. “It’s a ghost!” whispered Reddy, breathing heavily. “It’s Tim Dorsey’s ghost! D’ y’ raymimber, Jack, it was jist there thet th’ poor feller was killed last month! That’s his ghost, sure as I’m standin’ here!” “Oh, nonsense!” retorted Jack, with a little laugh, but his heart was beating faster than usual, as he peered through the darkness at the strange figure. What could it be that would stand there and wave its arms in that unearthly fashion? “It’s his ghost!” repeated Reddy. “Come on, Jack; Oi’m a-goin’ back!” “Well, I’m not!” said Jack. “I’m not afraid of a ghost, are you, Allan?” “I don’t believe in ghosts,” said Allan, but it must be confessed that his nerves were not wholly steady as he kept his eyes on the strange figure dancing there in the moonlight. “If it ain’t a ghost, what is it?” demanded Reddy, hoarsely. “That’s just what we’re goin’ t’ find out,” answered Jack, and started forward, resolutely. Allan went with him, but Reddy kept discreetly in the rear. He was no coward,—he was as brave as any man in facing a danger which he knew the nature of,—but all the superstition of his untutored Irish heart held him back from this unearthly apparition.