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The Symmes Purchase, also known as the Miami Purchase, was an area of land totaling roughly 330,000 acres (520 sq mi) in what is now Hamilton, Butler, and Warren counties of southwestern Ohio, purchased by Judge John Cleves Symmes of New Jersey from the Continental Congress.
In the 1780s, Benjamin Stites, a friend of Symmes, was visiting Limestone (now Maysville, Kentucky) and lost some of his horses to theft by Indians. Pursuing them through the wilderness of southwestern Ohio, he travelled as far north as Xenia, observing the fertility of the country in the process. He was so impressed with the region that he informed Symmes of its prospects upon his return. Symmes gathered a syndicate, known as the Miami Company, to buy the land.
The tract is bordered on the south by the Ohio River, on the west by the Great Miami River, and on the east by the Little Miami River. The northern boundary runs through Butler and Warren Counties about twenty-five miles north of the Ohio River. Sections of Todhunter and Garver Roads in Monroe, Monroe Road in Lebanon, and Oregonia Road in Turtlecreek Township run along the boundary.
Unfortunately, Symmes' men committed many errors while performing the survey, including using magnetic north rather than correcting for true north. Further, Symmes sold much land that he did not own, some as far north as Dayton, meaning that some early settlers found themselves squatters on the public domain. Symmes also sold some land that he did own more than once.
- "Symmes Purchase". Ohio History Central. Ohio Historical Society. Retrieved 26 September 2014.