text: According to the bibliographer Ibn al-Nadīm, the first Muslim alchemist was Khālid ibn Yazīd, who is said to have studied alchemy under the Christian Marianos of Alexandria.  The historicity of this story is not clear; according to M. Ullmann, it is a legend.  According to Ibn al-Nadīm and Ḥajjī Khalīfa, he is the author of the alchemical works Kitāb al-kharazāt (The Book of Pearls), Kitāb al-ṣaḥīfa al-kabīr (The Big Book of the Roll), Kitāb al-ṣaḥīfa al-saghīr (The Small Book of the Roll), Kitāb Waṣīyatihi ilā bnihi fī-ṣ-ṣanʿa (The Book of his Testament to his Son about the Craft), and Firdaws al-ḥikma (The Paradise of Wisdom), but again, these works may be pseudepigraphical.