3794291 A Compendium of Treatises on Astronomy and Mathematics by Nasir Al-Din Muhammad bin Al-Hasan Al-Tusi (d.1274), Seljuk Anatolia, probably Kaiseri (Qaysariya), 1279 (sepia & red ink on paper with later morocco binding) by Seljuq Dynasty (1016-1307); 24.4x16.6 cm; Private Collection; (add.info.: Dated beginning Rabi\' I and end of Jumada I, AH 678 / July and October 1279 AD. Five treatises on astronomy and mathematics, Arabic manuscript on paper, 153ff. plus two fly-leaves, each folio with 29ll. of flowing sepia naskh, important words and phrases picked out in red, numerous diagrams and tables throughout, some titles in strong larger naskh, copious marginal notes throughout in sepia and red, later numbering in ink in the upper outer corners, small areas of staining and repair throughout, in 14th or 15th century brown morocco binding with stamped geometric stellar motif and geometric borders, spine repaired, the doublures with scrolling arabesque.); Photo byChristie\'s Images.