Farini, Guillermo Antonio
Thomson, Joseph
Volz, Berthold August Emil
Jephson, Arthur Jermy Mounteney / Stanley, Henry Morton
Cecchi, Antonio
Stanley, Henry Morton
Schweinfurth, Georg August
Wissmann, Hermann von
Johnston, Harry Hamilton
Rohlfs, Gerhard Friedrich
Sibree, James
Fränkel, Albert
Weule, Karl
Cameron, Verney Lovett