| Butler, J., 1875. Rough notes on the Angami Nagas and their language. Journal of the Asiatic Society of Bengal 44 (4): 307-350
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| Butler, J., 1855. Travels and adventures in the Province of Assam, during a residence of fourteen years. London, Smith, Elder and Co, pp. i-x, 1-268
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| Butler, J., 1847. A sketch of Assam, with some account of the hill tribes. London, Smith, Elder and Co, pp. i-vi, v-x, 1-220
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| Butler, J., 1847. Climate and inhabitants of Assam. Glasgow Herald Friday 11 June 1847
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