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. By Captain William Allen, and T.R.H. Thomson. Pub. with the sanction of the Colonial office and the Admiralty / [William Allen].

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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. By Captain William Allen, and T.R.H. Thomson. Pub. with the sanction of the Colonial office and the Admiralty / [William Allen]. Public Domain Mark. Source: Wellcome Collection.