Typed manuscript of a rough draft for a proposed monograph, can be in relation to WP 1/3. It is the arrangement of the material researched on Archaic Manipuri divided into chapters with a bibliography for reference.

Collection of manuscripts on the language Manipuri by William Pettigrew, Yumjao Singh and Mrs Ethel A Pettigrew. A letter from Roland B Dixon (1875-1934) an American cultural anthropologist, the letter mentions work of William Pettigrew and a copy of Rules and Regulations of The Asiatic Society of Bengal.

Personal papers of William Pettigrew connected with the Manipuri language and other local dialects.