Husain ibn 'Ubaidallah al-Ansari al-'Azimabadi al-Najarnahwi, Sullam al-Aflak (A treatise on astronomy), India, Patna (Azimabad), dated 22 Jumada al-Thani 1284 AH/21 October 1867 AD

Arabic manuscript on paper, 30 leaves plus 4 fly-leaves, 17 lines to the page written in black nasta'liq script, significant words and diagram headings in red ink, diagrams illustrated in gold throughout, text and diagrams within narrow gold border and black and blue rules, in brown leather binding

22.4 by 14.7cm.