Ranabir Chakravarti, Nakhudas and Nauvittakas: Ship-owning Merchants in the West Coast of India (c. AD 1000-1500), Journal of the Economic and Social History of the Orient, vol. 43, no. 1 (2000), pp. 34-64, at pp. 38, 44 ff. He was recipient of the largest number of geniza trade documents. Originally from Tunisia, he spent some time in al Fustat (what is now Old Cairo) before he came to Manjrur (i.e., Mangalapura, presentday Mangalore) and stayed there from 1132 to 1149 CE.
The novelist Amitabh Ghosh has translated letters written by him.
