akmaluddin muHammad ibn muHammad al-babarti al-Hanafi 712-786AH ----- in man'hal al-Saafi, v11/p22 by abu'l maHasin yusuf al-atabiki (d.874 AH) --- interestingly the text (both editions: ghaznawi's and babarti's) mentions sarghatmash (d.759 AH) in very glowing terms; and both ghaznawi and babarti were contemporaries. so little can be known from that... ...but wait! ghaznawi mentions sarghatmash in similar words in his other book ghurratu'l munifah. now it tilts in favour of ghaznawi, though it is just speculative. even babarti could have said the same thing. Allah ta'ala knows best.