Moncure Daniel Conway,
Demonology and Devil-lore
“ Wodan also appears in the Schimmelreiter—headless rider on a white horse, in Swabia called Bachreiter or Junker Jäkele. This apparition sometimes drives a carriage drawn by four white (or black) horses, usually headless. He is the terrible forest spectre Hoimann, a giant in broad-brimmed hat, with moss and lichen for beard; he rides a headless white horse through the air, and his wailing cry, ‘Hoi, hoi!’ means that his reign is ended. He is the bugbear of children.In the Odinwald are the Riesenäule and Riesenaltar, with mystic marks declaring them relics of a temple of Odin. ”
