This study provides a critical edition of chapters nine and ten of Mu al-tav r kh (The Sea of Chronicles) by Mu ammad Am n b. M rz Mu ammad Zam n Bukh r ( f y n ). Mu al-tav r kh is a valuable source for the study of late seventeenth-century Central Asian history, historiography, and language. The present work represents the first critical edition of a primary source of Sub n Qul Kh n s reign. The ninth chapter (b b) offers accounts of the Timurid kings, Abulkhayrid/Shaybanid and the first four Ashtarkhanid/Janid khans. The tenth chapter presents a detailed account of the life and times of the last great Ashtarkhanid/Janid khan, Sub n Qul Bah dur (1682 1702), revealing historical information essential for scholars of the period and region."