Mason-Dixon Line Crownstone
The North-South line between the colonies of Maryland and Pennsylvania, now Delaware, was surveyed between June and September 1764 by Charles Mason, an astronomer, and Jeremiah Dixon, a mathematician and surveyor.
Leading a party of thirty-nine, Mason and Dixon measured off the line, planting waist high limestone markers at one mile intervals, returning later to place these crownstone markers every five miles.
Marker is on Cypress Road (Maryland Route 291), on the right when traveling east.
Courtesy hmdb.org
