- manuscript - H.H. Godwin-Austen, Journal of a Tour in Assam, 26th November 1872 to 15th April 1873
- printed - tour diary of the Deputy Commissioner of the Naga Hills for the year 1870-1872 (John Butler) volume two
- printed - tour diary of the Deputy Commissioner of the Naga Hills for the year 1870-1872 (John Butler) volume two