Travels and Discoveries in North and Central Africa: being a journal of an expedition undertaken under the auspices of H.B.M.'s Government, in the years 1849-55
1857|BARTH, Heinrich Traveller
Inner-Afrika Blatt 5. (Bagirmi & Wadai)
1863|Petermann, Augustus Herman; Hassenstein, Bruno1:2 000 000
Pays, sud du Lac Tchad. Afrique 30.
1827|Vandermaelen, Philippe, 1795-18691:1 641 836
Carte des découvertis faites dans le centre de l'Afrique
1826|Oudeney
West Africa II.
1839|Society for the Diffusion of Useful Knowledge (Great Britain)1:5 600 000
Travels and Discoveries in North and Central Africa: being a journal of an expedition undertaken under the auspices of H.B.M.'s Government, in the years 1849-55