The Foundation of Muslim Rule in India: A History of the Establishment and Progress of the Turkish Sultanate of Delhi, 1206–1290 A.D. c18.58

c18.58

In tracing the evolution of the *tankah* Thomas, and also Wright seem to have confined themselves to the Delhi series, thus taking no notice of the contributions of the Bengal mint. The silver issues of Ghiyasuddin Iwaz, king of Lakhnauti, dated in 616/1219, on the other hand, bear close resemblance, in design and form of the legend, to Iltutmish's final piece of 632/1234¹. His subsequent issues, notably those of 619/1221, and 620/1222, not only include the Caliph al-Nasir's name, but also approximate in weight to the 172-grains standard². They contain, in addition to Iwaz's expanded sovereign titles, also the exact date of the month and year, —a singular feature, which Thomas rightly interpreted as a commemoration of his receipt of investiture from the Caliph³.