text: Muḥammad ibn Umayl al-Tamīmī was a 10th-century Egyptian alchemist of the symbolic-mystical branch.  One of his surviving works is Kitāb al-māʿ al-waraqī wa-l-arḍ al-najmiyya (The Book on Silvery Water and Starry Earth).  This work is a commentary on his poem, the Risālat al-shams ilā al-hilāl (The Epistle of the Sun to the Crescent Moon) and contains numerous quotations from ancient authors. Ibn Umayl had important influence on medieval Western (Latin) alchemy, where his work is found under different names, mainly as Senior or as Zadith. His "Silvery Water" e.g. was reprinted as "The Chemical Tables of Senior Zadith" in the collection of alchemical texts: Theatrum Chemicum, and commented upon by Pseudo Aquinas in Aurora Consurgens. They both also give his (modified) image of the sage holding a chemical table (see image above).