1. Allen, W., and Thomson, T. R. H. (1848). A narrative of the expedition sent by Her Majesty's Government to the River Niger in 1841, under the command of Captain H. D. Trotter, R.N. 2 vol. Lond.: R. Bentley.
2. Armitage, C. H., and Montanaro, A. F. (1901). The Ashanti campaign of 1900, Lond.: Sands & Co.
3. Baikie, W. B. (1856). Narrative of an exploring voyage up the Rivers Kwóra and Binue (commonly known as the Niger and the Tsádda) in 1854. Lond.: J. Murray.
4. Beaver, P. (1805). African memoranda relative to an attempt to establish a-British settlement on the island of Bulama on the western coast of Africa in the year 1792. Lond.: C. & R. Baldwin.
5. Boyle, J. (1831). A practical medico-historical account of the western coast of Africa: embracing a topographical description of its shores, rivers, and settlements…; together with the causes, symptoms, and treatment, of the fevers of western Africa; and a similar account respecting the other diseases which prevail there. Lond.: S. Highley.