English: "Rough Sketch of Africa indicating the progress of recent discoveries"
See also File:Heinrich Barth's route through Africa, 1850 to 1855, with routes of previous explorers.jpg for another similar map.
Routes are shown for the journeys of the following explorers:
1. James Bruce, 1769–72
2. William George Browne, 1793–96
3. Mungo Park, 1795–96-1805
4. Francisco de Lacerda, 1796
5. Friedrich Hornemann, 1799
6. Johann Ludwig Burckhardt, 1813 & 1814
7. James Hingston Tuckey, 1816
8. Gaspard Théodore Mollien, 1818
9. Joseph Ritchie & George Francis Lyon, 1818–20
10. Walter Oudney, Dixon Denham & Hugh Clapperton, 1821–24
11. Hugh Clapperton & Richard Lemon Lander, 1825 & 1826
12. René Caillié, 1828
13. Richard Lemon Lander, 1830
14. William Allen & R.A.K. Oldfield, 1833
15. James Edward Alexander, 1836 & 1837
16. Charles Tilstone Beke, 1840–43
16a. Roualeyn George Gordon-Cumming, 1843–48
17. John Duncan, 1841 (Niger expedition of 1841)
18. Egyptian Expeditions, 1835–41 (Sent by Muhammad Ali of Egypt; see eg Ferdinand Werne (1849))
19. Johannes Rebmann & Johann Ludwig Krapf, 1847–49
20. David Livingstone, William Cotton Oswell and Mungo Murray, 1849–51
21. Francis Galton, 1851
22. Henry S. Gassiott, 1851 (report)
23.
James Richardson,
Heinrich Barth &
Adolf Overweg1850 & 1852