The inscription here is Qur'an XI, sura hud, v.88, wa ma tawfiqi illah b'illah tawakkaltu 'alayhi wa ilayhi anib.
Following the death of his father, Mustafa Izzet Efendi was sent from his birthplace of Tosya to the Fatih religious school in Istanbul, where he studied music. After impressing the Sultan Mahmud II with his performance at the Hidâyet mosque in Bahçekapi, he was ordered to be sent to the Palace School, and went on to study there for three years. A highly skilled and accomplished musician, he also learned thuluth and naskh scripts from Çömez Mustafa Vâsif Efendi, and ta'liq and jali ta'liq from Yesârîzâde Mustafa Izzet Efendi. He went on to become a favourite of the Sultan, but felt stifled by court ritual, eventually leaving the palace to live the life of a dervish. Later, during the reign of Sultan Abdulmecid, he received a number of important official positions, including Chief of the Descendants of the Prophet. The creator of the 'Kadiasker School,' his students included Sefik Bey, whose work is also seen in this catalogue (lot. 375.) His work is published in M. Ugur Durman, Eternal Letters: From the Abdul Rahman Al Owais Collection of Islamic Calligraphy, Sharjah, exhibition catalogue, Sharjah, United Arab Emirates, 2009, nos.38 and 38a-b, pp. 164-9, and M. Ugur Derman, Letters in Gold, exhibition catalogue, New York, 1998, nos.36-7, pp.116-9.