al-Fadl wal Minnah bi-Ta'leeqaat Mukhtasarah 'ala Usool as-Sunnah li-Imaam as-Sunnah Ahmad bin Hanbal (Rahimahullaah ta'ala)
 الفضل والمنة بتعليقات مختصرة على أصول السنة لأإمام أحمد بن حنبل

Written by Ash-Shaykh 'Abdur Rahman bin Yahya Muhayy ad-Deen is an explanation of Usool as-Sunnah written by 'al-Imaam Ahmed (May Allah have mercy on both of them).