Timeline Friday 9 October 1767

Events on Friday 9 October 1767 1

• 1767 Mason-Dixon survey of the Pennsylvania-Maryland line completed Astronomers finish marking the colonial boundary later known as the Mason-Dixon Line Astronomers Charles Mason and Jeremiah Dixon completed the main west survey line marking the disputed boundary between the Pennsylvania and Maryland colonies. Their precise astronomical survey settled decades of territorial dispute and later became a cultural symbol of the divide between northern and southern states.