Alexander Lawson (American, 1773 - 1846)
Aert Schouman (Dutch, 1710-1792)
Johann Friedrich Naumann (German, 1780 – 1857)
Johann Friedrich Naumann (German, 1780 – 1857)
Louis Agassiz Fuertes (American, 1874 – 1927)
Emil August Göldi (Swiss, 1859-1917)