Albert Ritzberger (Austrian, 1853 - 1915)
Carl Diethelm Meyer (Swiss, 1840 - 1884)
Jørgen Sonne (Danish, 1801 – 1890)
Nils Andresson (Swedish, 1817–1865)
Dietrich Wilhelm Lindau (German, 1799-1862)
Friedrich August Matthias Gauermann (Austrian, 1807-1862)