



Edward Penfield (American, 1866 - 1925)

Louis Agassiz (American, 1807 – 1873)








Edwin Forbes (American, 1839 – 1895)



Dugald Stewart Walker (American, 1883 – 1937)







Paul Wenzel (Publisher) (American, 19th Century)

Dugald Stewart Walker (American, 1883 – 1937)


