Tucker, Alfred Robert
Chaillu, Paul Belloni du
Grant, James August
Spillmann, Joseph
Flegel, Eduard Robert
Klunzinger, Carl Benjamin
Hartung, Georg
Wormser, Johan Adam
Andree, Karl
Harris, Sir William Cornwallis
Schweinfurth, Georg August
Engelbert Mager
Johnston, Harry Hamilton
Schynse, August Wilhelm
Fränkel, Albert
Barth, Heinrich
Lenz, Oskar
Weber, Ernst von
Lux, Anton Erwin