This research tries to shed light on the personal bookcase belonging to one of the of the unknown scientists of Haditha al- Mosul, and recognizing the cultural value of some of the manuscripts and old papers which found in this bookcase and wrote by a number of renowned scientists in linguistics and Arabic grammar, poetry and Hadith, who lived mostly between centuries (2-4 AH / 8-10 AD) through an important text in one page contained in the book (al-Fihrist) by Ibn al-Nadīm (d. 380 AH / 990 AD), which this study will try to analyze and comment on after the definition of the most important words of the text.