1851. Ford, Sir Francis. Neilgherry Letters. Bombay, 1851.
1851. Burton, R. F. Goa and the Blue Mountains. London, 1851 (pp. 316–344).
1856. Caldwell, R. A Comparative Grammar of the Dravidian Languages. London; p. 503, “Are the Nilgherry Tudas Dravidians?” (2nd edition, 1875, p. 555).
1857. Metz, J. F. Die Volkstämme der Nilagiri’s. Basel.
1857–8. Metz, F. A Vocabulary of the Dialect spoken by the Todas of the Nilagiri Mountains. Madras Journ. Lit. and Sci., N.S., vol. i, pp. 103, 131, and vol. ii, p. 1.
1864. Metz, F. The Tribe inhabiting the Neilgherry Hills: their Social Customs and Religious Rites; from the rough notes of a German Missionary. Second enlarged edition, Mangalore.
1868. Shortt, J. An Account of the Tribes on the Neilgherries. Madras (republishes part of Ouchterlony’s Memoir).
1869. Shortt, J. An Account of the Hill Tribes of the Neilgherries. Trans. Ethnol. Soc., N.S., vol. vii, p. 230.
1870. King, W. Ross. The Aboriginal Tribes of the Nilgiri Hills. London (republished from Journal of Anthropology).
1873. Marshall, William E. A Phrenologist among the Todas. London (includes “a Brief Outline of the Grammar of the Tuda Language,” by the Rev. G. U. Pope). [[733]]