"Pettigrew's fascination with Meetei culture went beyond even this. As early as 1896 he had cooperated with Grierson in the section on Manipuri in the latter's multi-volume Linguistic Survey of India. In the early 1920s Grierson, having examined Hodson's version of Numit Kappa in 'old Manipuri' as well as some of Damant's papers, suggested to Pettigrew that he investigate, in cooperation with some Meetei scholars, the archaic Manipuri language and script, since no other Tibeto-Burman language was known to have a literary corpus."