Analysis of information sources in references of the Wikipedia article "Sayf al-Din Bilbay" in English language version.
...on the 9th of October 1467, when the Atābeg Yelbai was selected by the Mamelukes to succeed him, and was proclaimed sultan with the title of Malik al-Ẓāhir. This person, proving incompetent, was deposed by a revolution of the Mamelukes on the 4th of December 1467