When Maryland Almost Got Philadelphia: The Remarkable Story of the Mason-Dixon Line – Maryland Center for History and Culture

It takes a shrewd fellow indeed to persuade the King of England to grant him a charter to all the…

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[Stolen]

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When Maryland Almost Got Philadelphia: The Remarkable Story of the Mason-Dixon Line – Maryland Center for History and Culture

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The men who drew the Mason-Dixon Line - BBC News

The Mason-Dixon Line—America's Great Divide — Harvard University Press