Previous Next Work C.1.0980 Abū Saʿd al-ʿAlāʾ b. Sahlal-Burhān ʿalā anna l-falak laysa huwa fī ghāyat al-ṣafāʾ MSS Oxford, BL, Marsh 720, f. 176r-176v (1657-8?) Oxford, BL, Thurston 3, f. 93r (660-675/1262-1277)