O.5.15 (Wren Library, Trinity College Cambridge)
1 copy of Kitāb Aristarkhūs fī jurmay al-nayyirayn
An Arabic translation of Aristarchus' Greek astronomical treatise on the sun and the moon, probably by Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad.
Inelegant European handwriting
Illustrated with seventeen diagrams