Schatz, Der by Eduard Mörike (1804 – 1875)

A fairy-tale ghost novella.
At his confirmation, Franz Arbogast, born on an Easter Sunday, received a mysterious little book of life rules for Easter children. Years later, he is travelling as a journeyman goldsmith to buy precious stones for a crown, but all his money is mysteriously stolen. Even more mysterious, however, is that his little book predicts the loss and advises him not to chase after what he has lost, as he will soon find it again on his own. Franz therefore stays in the area and comes to a castle, where, according to legend, a ghost haunts that can only be freed by an Easter child. He is welcomed as a guest by the castle's stewards, and here he encounters all sorts of wondrous things.
(Summary by Hokuspokus)