 His "Early Chauhan Dynasties" was first published in 1959, a revised edition was published in 1975 and reprinted in 2002.The manuscript argues that the Agnikula myth of the origin of Rajputs was adapted from Valmiki and calculates the year of birth for Prithiviraj III using planetary positions described in the "Prithvirajavijaya".It also attributes the success of Muhammad Ghori to the rivalry between the Chauhans of Shakhambari and the Chaulukyas (Solanki) of Gujarat.