From the Mason and Dixon Line Preservation Partnership:
The Mason and Dixon Line Preservation Partnership (MDLPP) will unveil a Crown Stone set on the border of Maryland and Pennsylvania by Charles Mason and Jeremiah Dixon, 250 years ago. The Crown Stone was lost and had not been seen for over 110 years. A replica Crown Stone, showing how the original stone looked when it was set, will also be unveiled.
The dedication will take place at 10 a.m. on Saturday, May 21 at the State line at PA State Route 24 / Maryland Route 23.
Latitude/Longitude: 39.721001 -76.543333. Between Norrisville, Maryland and Stewartstown, Pennsylvania.
Harford County Executive Barry Glassman, York County Commissioners Susan Byrnes, Doug Hoke and Chris Reilly, and Todd Babcock and Patrick Simon from MDLPP will be in attendance.
From November 1763 to September 1768, Mason and Dixon surveyed the border between the provinces of Maryland and Pennsylvania. They set carved limestones, with a “P” on the Pennsylvania side and a “M” or the Maryland side every mile along the boundary. Every fifth mile they set a Crown Stone with the Calvert family crest of the Maryland side and the Penn family crest of the Pennsylvania side. This Crown stone in numbered 40, as it is 40 miles west of the northeast corner of Maryland.
Crown Stone 40 has some very interesting history associated with the reason it has been lost for over 110 years. This history has made this Crown Stone unique from all the other stones Mason and Dixon set on the Pennsylvania and Maryland border.
The 250 year old Crown Stone and replica Crown Stone will be revealed at this event. Another Crown Stone, located about 150 feet away, that was set during a 1902 U.S. Coast and Geodetic Survey of the line will be visible. The actual location of additional posts set by Mason & Dixon to allow them to place the Crown Stone.