a partially conserved portrait depicting a turbaned and haloed adolescent figure with full cheeks, slanted eyes, and a small, sinuous mouth. The Armenian historian Movses Kaghankatvatsi describes the Turks of the Western Turkic Khaganate as "broad-faced, without eyelashes, and with long flowing hair like women". Al-Masudi writes that the Oghuz Turks in Yengi-kent near the mouth of the Syr Darya "are distinguished from other Turks by their valour, their slanted eyes, and the smallness of their stature." Later Muslim writers noted a change in the physiognomy of Oghuz Turks. According to Rashid al-Din Hamadani, "because of the climate their features gradually changed into those of Tajiks. Since they were not Tajiks, the Tajik peoples called them turkmān, i.e. Turk-like (Turk-mānand)." Ḥāfiẓ Tanīsh Mīr Muḥammad Bukhārī also related that the Oghuz' ‘Turkic face did not remain as it was’ after their migration into Transoxiana and Iran. Khiva khan Abu al-Ghazi Bahadur wrote in his Chagatai language treatise Shajara-i Tarākima (Genealogy of the Turkmens) that "their chin started to become narrow, their eyes started to become large, their faces started to become small, and their noses started to become big’ after five or six generations". Ottoman historian Mustafa Âlî commented in Künhüʾl-aḫbār that Anatolian Turks and Ottoman elites are ethnically mixed: "Most of the inhabitants of Rûm are of confused ethnic origin. Among its notables there are few whose lineage does not go back to a convert to Islam." Kevin Alan Brook states that like "most nomadic Turks, the Western Turkic Khazars were racially and ethnically mixed." Istakhri described Khazars as having black hair while Ibn Sa'id al-Maghribi described them as having blue eyes, light skin, and reddish hair. Istakhri mentions that there were "Black Khazars" and "White Khazars." Most scholars believe these were political designations: black being lower class while white being higher class. Constantin Zuckerman argues that these "had physical and racial differences and explained that they stemmed from the merger of the Khazars with the Barsils." Old East Slavic sources called the Khazars the "White Ugry" and the Magyars the "Black Ugry." Soviet excavated Khazar remains show Slavic-type, European-type, and a minority Mongoloid-type skulls. The Yenisei Kyrgyz are mentioned in the New Book of Tang as having the same script and language as the Uyghurs but "The people are all tall and big and have red hair, white faces, and green eyes." The New Book of Tang also states