by Rachel DeShong, Special Event Coordinator and Map Curator This blog post is the second in a series of three posts highlighting John Melish, a 19th century cartographer, and the impact his 1816 map,  Map of the United States with the Contiguous British & Spanish Possessions, had on U.S. history. The Adams-Onís Treaty of 1819 was … Continue reading Part II: Compromise Leads to Conflict: The Adams-Onís Treaty