[1] The Arabic version of the Akhbār mulūk al-Andalus along with ʿĪsā's contribution to it is now lost.
[c] His sections are richer in detail than his father's and reflect the cultural interests of the court of ʿAbd al-Raḥmān and his successor, al-Ḥakam II.
ʿĪsā may have had access to the history of the Franks by Bishop Gotmar that ʿAbd al-Raḥmān had commissioned.
[1] Ibn Ḥayyān quotes ʿĪsā's history of al-Ḥakam's reign from 971 to 975 in his Muqtabis.
[3] Of Aḥmad and ʿĪsā, Ibn Ḥayyān writes, "Together they endowed the Andalusis with a science [historiography] they had not hitherto practised with success.