Shahr Kitab al-Asturlab (Commentary on the Book of the Astrolabe), dated 1299 H / 1881 Arabic manuscript on paper, 15 to 20 lines per page in naskhi calligraphy with sepia and red inks. In the body of the text, several diagrams and tables of figures and letters. Manuscript in several quires in a modern hardback binding and slipcase. The date 1299 H / 1881 is inscribed on the penultimate page. Size of folios: 23.7 x 16.8 cm; size of slipcase: 26.5 x 18.7 cm Manuscript incomplete, freckles, folds, stains, small tears, original binding missing. Enclosed is a notebook unrelated to the first manuscript, entitled Kitab Fawa'id [?] by another hand and dated 6 Moharram 1315 H / June 7, 1897, and a folio from a third manuscript.