 More recent studies, on the line of a seminal article by Fierro (Fierro Bello 1996; cf. Hamdani, Soufan 2019, 11–12, but also Carusi 2000), have identified Maslama b. Qâsim al-Qurtubî, called al-Majrîtî (d. 964, previously confused with the scientist Maslama al-Majrîṭî, d. 1007) as the author of the encyclopedia (cf. Hamdani 1999, 75; de Callataÿ 2013, Kacimi 2014a, b, de Callataÿ, Moureau 2015). However, the one who introduced in Spain the whole work is still to be considered Abu ’l-Ḥakam al-Kirmânî, d. 1066). Because of this new discovery, the timing of the Rasâ’il has been anticipated of several decades at least. So, the old attribution of al-Tawhîdî and ‘Abd al-Jabbâr was revoked in doubt, beginning with de Callataÿ who had previously accepted it (de Callataÿ 2014; cf. Hamdani, Soufan 2019, 14–15; a reconstruction of the journey, material and intellectual, of Maslama al-Qurtubî in al-Andalus is in de Callataÿ, Moureau 2017). Maslama al-Qurtubî has been also recognized as the author of Rutbat al-ḥakîm (‘The level of the wise man’) and Ghâyat al-ḥakîm (‘The goal of the wise man’, being known in Latin as Picatrix), two important works on alchemy and magic respectively that are now both to be reported to the first half of the 10th century. Scholars have also emphasized the impact of the encyclopedia on these two works, and it has even been hypothesized Maslama to be one of the authors of the epistles (Carusi 2000), which should not date later than 950. In the light of this new chronology, de Callataÿ 2014 examines the possible influence of the Ikhwân on Ibn Masarra (d. 931), especially on his cosmology, reporting this author to the Andalusi bâṭinî context of the first half of the tenth century. If the epistles were circulating in al-Andalus already before 950, and their compilation must have begun some time before in the East, another consequence is that the Ikhwân influenced al-Fârâbî and not vice versa, as it was believed so far (Hamdani 2011). According to Poonawala, the encyclopedia was composed after al-Kindî (d. between 864 and 870) but before al-Fârâbî (d. 950; Poonawala 2011, Introduction, 59). Among those who sustain the attribution of the epistles to Maslama al-Qurtubî is also Madelung who, therefore, rejects a too high dating of the epistles. The scholar has speculated that Maslama not only brought the encyclopedia to Spain, but also contributed to its composition: there would have been a first version, no longer existing, compiled not long before 937, the one described by al-Tawhîdî, and consisting of previously existing epistles and of epistles especially composed for the purpose; the Brotherhood would have been founded a few decades earlier (Madelung 2018, 404).