This book is a compilation from entries in at-Ta'liq al-Mumajjad - Shaykh Abd al-Hayy al-Laknawi's commentary on the Muwatta al-Imam Muhammad - which go into some detail on the narrators of the hadith and traditions in that book, most particularly their standing as scholars of hadith. Since the majority of narrators here are among the great authorities of the Companions, the Followers, and Followers of the Followers later confirmed by al-Bukhari and Muslim and the rest of the major hadith scholars, this work will prove indispensable for the serious student of the narrators of hadith.