From the Introduction of the Editor: This «first imperfect edition» of Rutbat al-hakim is based mainly on three manuscripts [Ms. Paris Arabe 2612, Ms. Istanbul, Süleymaniye, Hajji Mahmud 6224, and Ms. Teheran, Kitabkhaneh Milla Malek 5346], «in order to provide a reasonably reliable text as originally composed by the author without any of the corrections and alterations introduced by later scholars of alchemy who used the book as their teaching manual.» «The correct identification of the author as Maslama b. Qasim al-Qurtubi (d. 353/964) was first proposed by Maribel Fierro in an article in 1996. [...] For CALA the early dating of the Rutbat al-hakim is significant, since Maslama al-Qurtubi is the first author to mention the Arabic translation of the Mushaf as-suwar attributed to Zosimos of Panopolis (Arabic Akhmim) of which a manuscript dated in 668/1211 has been published by Theodor Abt in CALA II. Maslama al-Qurtubi states that he considered Zosimos as his master and teacher among pre-Islamic alchemists. [...] It should be noted, that the version of the Mushaf as-suwar Maslama had, differed significantly from the published version which represents a translation produced much later in Egypt. The two Arabic versions evidently are based on different Greek originals. […]»