http://en.wikipedia.org/wiki/Francis_Parkman

Francis Parkman (September 16, 1823 – November 8, 1893) was an American historian, best known as author of The Oregon Trail: Sketches of Prairie and Rocky-Mountain Life and his monumental seven-volume France and England in North America. These works are still valued as history and especially as literature, although the biases of his work have met with criticism. He was also a leading horticulturist, briefly a Professor of Horticulture at Harvard University and the first leader of the Arnold Arboretum, and author of several books on the topic.