Alexander Wetterling (Swedish, 1796-1858)
Christian Schussele (American, 1824 – 1879)
Antonie F. Zürcher (Dutch, 1825 – 1876)
Charles Rochussen (Dutch, 1814 – 1894)
Paul Tetar van Elven (Dutch, 1832 – 1896)
Joseph Anton Strassgschwandtner (Austrian, 1826 – 1881)