- typescript - J.H. Hutton tour diary in the Naga Hills
- printed - tour diary of the Deputy Commissioner of the Naga Hills for the year 1870-1872 (John Butler) volume two
- published - extracts on Nagas from 'Assam Administration Report'
- published - extracts on Nagas from 'Assam Administration Report'
- published - extracts on Nagas from 'Assam Administration Report'