" The Turba philosophorum or Peat of the Philosophers (in the sense of Assembly of Philosophers) is one of the first and most famous texts of medieval Western alchemy. There are two versions. A Latin of the thirteenth century, the Turba Philosphorum proper, and which is in fact the translation of an Arabic treatise of the tenth century. And one in French, called Turba Gallica, from the 15th century, a probable translation of an original in Castilian...