Thomas Pynchon, 1997. Charles Mason and Jeremiah Dixon surveying the colonial American line.
From Wikipedia
Mason & Dixon is a postmodernist novel by the American author Thomas Pynchon, published in 1997. It presents a fictionalized account of the collaboration between Charles Mason and Jeremiah Dixon in their astronomical and surveying exploits in the Dutch Cape Colony, Saint Helena, Great Britain, and along the Mason-Dixon line in British North America on the eve of the Revolutionary War in the United States.