1. For a wide and often conflicting range of interpretations on the development of frontier societies read the following works:
2. Frederick J. Turner,The Frontier in American History(New York, 1920), pp 1–39;
3. Martin Legassick, ‘The Griqua, the Sotho-Tswana, and the missionaries, 1780–1840: The Politics of a Frontier-Zone, (unpublished Ph.D. thesis, University of California, 1969).
4. Michael R. Barbour, ‘Natal: 1824–1956, A Review of Some Economic Aspects of the Colony from its Foundation to the Granting of Representative Government’, (unpublished Honours thesis, University of Natal, 1972), p.1.