Charles A. Beard,
History of the United States — XII
(1921)
“ Iowa and Minnesota.—To the southwest of Wisconsin beyond the Mississippi, where the tall grass of the prairies waved like the sea, farmers from New England, New York, and Ohio had prepared Iowa for statehood. A tide of immigration that might have flowed into Missouri went northward; for freemen, unaccustomed to slavery and slave markets, preferred the open country above the compromise line. With incredible swiftness, they spread farms westward from the Mississippi. ”
