Thomson, Joseph
Wormser, Johan Adam
Cruickshank, Brodie
Richardson, James
Volz, Berthold August Emil
Jephson, Arthur Jermy Mounteney / Stanley, Henry Morton
Andree, Karl
Cecchi, Antonio
Paulitschke, Philipp Edler von Brügge
Stanley, Henry Morton
Schweinfurth, Georg August
Wissmann, Hermann von
Mannheim, Leo
Johnston, Harry Hamilton
Rohlfs, Gerhard Friedrich