Did Lewis Cass ever vist Minnesota and if so when and why?

Question

My 9 yr. old son is doing a report on Lewis Cass for school and needs to know this info.

Answer 1

http://en.wikipedia.org/wiki/Lewis_Cass
In 1820 he led an expedition to the northern part of the territory, in the northern Great Lakes in present-day northern Minnesota, in order to map the region and discover the source of the Mississippi River. The source of the river had been unknown until then, resulting in an undefined border between the United States and Britain. The expedition erroneously identified Cass Lake as the source of the river. The source of the river was correctly identified in 1832 by Henry Schoolcraft, who had been Cass's expedition geologist, as nearby Lake Itasca.


http://en.wikipedia.org/wiki/Cass_Lake_(Minnesota)
The lake is both fed (from the west) and drained (to the east) by the Mississippi River. In 1820 an expedition led by General Lewis Cass, after whom Cass Lake is named, erroneously identified the lake as the source of the Mississippi. In 1832 Henry Schoolcraft, who had been on the 1820 expedition, identified the actual source of the river as being in nearby Lake Itasca.


There are a lot of counties named after him

Answer 2

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

Cass County. Named for Lewis Cass. Explored upper Mississippi to Cass Lake in 1820; governor, Michigan Territory, 1813-31; U.S. Secretary of War, 1831-36; U.S. Senator from Michigan 1945-57; U.S. Secretary of State, 1857-60.

http://www.answers.com/topic/cass-lake-minnesota-1