Arndt burst into tears, and told his friend of all that had happened that night. The peddler's face grew graver and graver as the boy told him it was on this very spot that he lost his little sister.
"Arndt," whispered he, "did you ever hear of the Hill-men? It is they who have carried little Reutha away."
And then the old man told how in his young days he had heard strange tales of this same moor; for that the little mound was a fairy-hill, where the underground dwarfs lived, and where they often carried off young children to be their servants, taking them under the hill, and only leaving behind their shoes. "For," said the peddler, "the Hill-people are very particular, and will make all their servants wear beautiful glass shoes instead of clumsy leather."
So he and Arndt searched about the hill, and there, sure enough, they found Reutha's tiny shoes hidden under the long grass. At this her brother's tears burst forth afresh.
"Oh! what shall I do to bring back my poor sister? The Hill-men and women will kill her!"
"No," said the old man, "they are very good little people, and they live in a beautiful palace underground. Truly, you will never see Reutha again, for they will keep her with them a hundred years; and when she comes back you will be dead and buried, while she is still a beautiful child."
And then, to comfort the boy, the peddler told him wonderful stories of the riches and splendour of the Hill-people, how that sometimes they had been seen dancing at night on the mounds, and how they wore green caps, which, if any mortal man could get possession of, the dwarfs were obliged to serve him and obey him in everything. All this Arndt drank in with eager ears; and when the peddler went away he sat a long time thinking.
"I will do it," at last he said aloud. "I will try to get my dear Reutha safe back again."
And the boy stole noiselessly to the mound which the Hill-men were supposed to inhabit. He hid himself among the surrounding bushes, and there he lay in the silence and darkness, his young heart beating wildly, and only stilled by one thought that lay ever there, that of the lost Reutha. At last a sudden brightness flashed upon the boy's eyes; it could not be the moon, for she had long set. No; but it was a sight more glorious than Arndt had ever dreamed of.
The grassy hill opened, and through this aperture the boy saw a palace underground, glittering with gold and gems. The Hill-men danced about within it, dressed like tiny men and women. Arndt thought how beautiful they were, though they seemed no bigger than his own baby sister of six months old. One by one they rose out of the opening, and gambolled on the snow-covered mound; but wherever they trod flowers sprang up, and the air grew light and warm as summer. After a while they ceased dancing and began ball-playing, tossing their little green caps about in great glee. And lo and behold! one of these wonderful caps, being tossed farther than usual, lighted on the very forehead of the peeping boy!