The Northwest Territory 1787
This map shows the new territory created in the United States in 1787 as a "free" territory. Any slave entering the state after 1787 was deemed free, although slaves already residing there remained the property of their owners. Since this territory abutted Upper Canada, across the Detroit River, slaves could cross into the U.S. from Canada to gain their freedom, and many did so.
Charles Kendall Adams, A History of the United States (Boston, MA: Allyn and Bacon, 1909) 189
Courtesy the private collection of Roy Winkelman
Public Domain for Students