The Marrow of Alchemy, Being an Experimental Treatise [in Verse], Discovering the ... Mystery of the Philosophers Elixer ... By Eirenæus Philoponos Philalethes. [The Address to the Reader, in Pt. 1, is Signed, "Egregius Christo," and the Advertisement, in Pt. 2, "Vir Gregis Custos ; " Both Signatures Being Anagrams on Forms of the Name George Starkey.]