Gordon Hall Gerould, The Grateful Dead; the history of a folk story
“ A youth pays his all for the burial of a poor man, whose ghost joins him. They go to a city, where a bespelled princess kills all her suitors who cannot answer a riddle. The companion spirit tells the youth to save her, explaining his own identity. He gives wings and an iron rod to the hero, who flies with the princess to a mountain spirit, and hears that he must guess that she is thinking of her father’s white horse. The next night the youth follows her with two rods and is thus enabled to guess that she is thinking of her father’s sword. ”
