1839|Society for the Diffusion of Useful Knowledge (Great Britain)1:5 600 000
Carte des découvertis faites dans le centre de l'Afrique
1826|Oudeney
Neueste Karte von Sudan und Guinea
1860|Meyer, J.
West Africa. No. II
1848|Morse, Sidney E.1:8 500 000
Cyclopædia of Modern Travel ... comprising narratives of the most distinguished travelers since the beginning of this century: prepared and arranged by Bayard Taylor
1856|Taylor, Bayard.
A Narrative of the Expedition sent by Her Majestys Government to the River Niger in 1841, under the command of Capt. H. D. Trotter. [With plates.]
1848|ALLEN, William Captain, R.N., and THOMSON (Thomas Richard Heywood)
Map of the West Coast of Africa comprising Guinea, and the British possessions at Sierra Leone, on the Gambia and the Gold Coast, together with the countries within the courses of the rivers Senegal, Gambia & Kowara
1842|comp. from official documents, by John Arrowsmith1:3 200 000