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.

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

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.