218 mentary upon Hikmet al din, " the Science of what is "essential,"1 and afterwards the Commentary upon Tajerid* " Divestment of what is accessory," with marginal notes; also the physiological part of the Commentary upon Ishdret,* " Indications (allegori- " cal, symbolical, and others);" and, finally, the Ilahyat shafa, " the Hymns of Recovery." Thus also, Mulla Yaciib read with him the Taherir, " Writings" of Euclid, and a Commentary upon Tazkerah,4 " Commemoration;" and was attached to him. Likewise Mir Sherif, having read the Mu- tavel,5 " Development," and the Tafsir, " Explana- " tion," of Baizavi,6 resolved to follow his school; eddin Mifazzel, son of Omar al Abheri. The author died in the year of the Hejira 660 (A. D. 1261). 1 The author of Hikmet al din was Najem eddin Abu 'I Hassan Ali, son of Muhammed, surnamed Dabiranal Katebi al Kazvini. He was a disciple of the celebrated Nasir-eddin Tusi, and died in the year of the Hejira 675 (A. D. 1276). 2 We find, in the Bibliographical Dictionary of Haji Khalfa, several titles of books beginning by the word Tajerid. 3 There exists a work entitled Isha'ret, composed by Asir-eddin Mi- fazzel, before-mentioned. 4 The Tazkerah was written by Nasir-eddin Tusi. 5 The Mutavel denotes a Commentary, the author of which is Sdad- eddin Taftarani (or " Tagtarani," according to Herbelot), upon the work Meftafi al alum, *' the Key of Sciences," and which is entitled Talkhis al Meftah, <4 Explanation of the Key." 6 Baizavi is the surname of Nasir eddin Abu Said Abdalla Sen Omar, a native of the town Baizah, in the province of Fars, about forty-five miles distant from Shiraz. He was a Ka'si', " judge," of the last-named town, from which he passed to Tauris, where he died in the year of the