This 14th-century manuscript of a work by Abu Ishaq Ibrahim ibn Qurqul (1111−74) is an analysis of lexical problems arising from the canonical hadith texts of al-Bukhari and Muslim ibn al-Hajjaj. Ibn Qurqul’s work is modeled after the better known work by Qadi ‘Ayad, Mashariq al-Anwar `ala Sahih al-Athar (A dawn light upon authentic revelation). This is the third and final portion of a set that begins with the letter ‘ayn and continues to the end of the alphabet. The text typically begins with a review of the morphology of a word, followed by instances in which the word is used by hadith authorities and other writers, and ends with a few examples of how the word is used in context. Ibn Qurqul was born in Andalusia (present-day Spain) and taught, preached, and wrote in cities in Iberia and Morocco. He died in Fez. This work has been reprinted several times, but it has never been critically edited. This manuscript has 193 numbered leaves with folios 19 to 27 missing. The first leaf is decorated with a gilt frame around a bold ornamental text, which unfortunately is so damaged as to be illegible. The rest of the text is in a careful naskh script. The numbering of the leaves is not contemporary with the copying. Repairs and restorations are apparent throughout the volume. The title and author note and the table of contents were supplied at a later date.