Everyone knows the sciences flowed through the medieval Arabic world — algebra, astronomy, medicine — and out again into Europe. Almost nobody tells that story about fortune-telling. This is that story.
A history of divination told as a history of routes: the omen archives of Babylon, the Hittite relay, Egypt's star clocks, the incense road and Himyar, the Indian corridor, letters that learned to count from Miletus to the Arabic abjad, Rome's legislated closure, the Sasanian recovery at Gundeshapur, the Kabbalah bridge, the Abbasid hub, and the outward rivers — al-Andalus, the Crusades' demand, Venice's presses, and the living river of geomancy south into Africa. Fourteen strata, dated and sourced.
Cast a geomantic shield chart · Find tonight's lunar mansion · Read the companion essay, Wheel, Letter, and Verse