8vo (194 x 130 mm). Arabic manuscript on paper, 90 leaves, 15 lines per page written in more than one hand in cursive script with several words in red; numerous diagrams and tables. (A few old repairs occasionally affecting letters.) Contemporary limp red morocco.

The three works comprise:
1. al-Durr al-manthur fi'l-'amal bi-rub' al-dustur, a treatise on the quadrant.
2. Raqa'iq al-haqa'iq fi hisab al-daraj wa'l daq'iq, Subtleties of Truths on Arithmetic of Degrees and Minutes, a commentary on a work by the Egyptian mathematician and astronomer Shihab al-din Abu'l-'Abbas Ahmad ibn Rajab ibn Tibugha 'Ibn al-Majdi' (1365 -1447), entitled Kashf al-haqa'iq fi hisab al-daraj wa'l-daq'iq, Opening Truths on Arithmetic of Degrees and Minutes.
3. A commentary, Risalah [al-Fathiyya (al-Shihabiyya)] fi'l-'amal al-jaybiyya, Treatise on [Fath al-Din (Shihab al-Din)] Operations with the Sine [Quadrant].

The author of these three treatises, Badr al-Din Abu 'Abdallah Muhammad ibn Muhammad ibn Ahmad al-Misri al-Dimashqi, better known as Sibt (Ibn Bint) al-Maridini, lived in Cairo and Damascus.  He was the time-keeper of the al-Azhar mosque in Cairo, and was a pupil of Ibn al-Majdi. See B. A. Rosenfeld & E. Ihsanoglu, Mathematicians, Astronomers & Other Scholars of Islamic Civilisation and their Works, Istanbul 2003, pp. 276–277, no. 815, and pp. 293–298, no. 873.