He believed that without mathematically described knowledge, one could not go beyond a schoolboy's understanding of science.[1] Allama Tafazzul Husain Kashmiri had already translated Newton's "Principia" into Arabic in 1789. After Dinwiddie started teaching in Calcutta, in October 24, 1794, the old Allama enrolled himself as a student. Dinwiddie first taught him Optics and then modern geometry.