Near Newark in New Castle County, Delaware — The American Northeast (Mid-Atlantic)

Site of Post Mark'd West

Photographed by Pete Skillman, March 25, 2024

1. Site of Post Mark'd West Marker

Inscription. (Eastern Face):
Set up by Mason and Dixon June 12 1764

(Northern Face):
This post used as a base point in the survey of Mason Dixon Line 1763 - 1767

(Western Face):
West

Erected 1953 by DuPont.

Topics. This historical marker is listed in these topic lists: Colonial Era • Landmarks. A significant historical date for this entry is June 12, 1764.

Location. 39° 43.343′ N, 75° 43.942′ W. Marker is near Newark, Delaware, in New Castle County. It can be reached from Bryan's Field. Touch for map. Marker is at or near this postal address: Bryan's Fld, Newark DE 19711, United States of America. Touch for directions.

Regionally, this marker is in Greater Wilmington and in Greater Philadelphia.

It is also in the American Mid-Atlantic

and on the Delmarva Peninsula.

Globally, it is in the North Atlantic Region,

North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once New Netherland

and also one of the original Thirteen Colonies.

Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies: The Post Mark'd West

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(here, next to this marker); Pioneer of Preservation (approx. 0.4 miles away); Ebenezer United Methodist Church (approx. 1.1 miles away); Original Site of the White Clay Creek Presbyterian Church (approx. 1½ miles away); Eastburn-Jeanes Mining Complex (approx. 1.6 miles away); The Judge Morris Estate (approx. 1.7 miles away); a different marker also named Judge Morris Estate (approx. 1.8 miles away); Dorothy P. Miller: Champion of Preservation (approx. 1.9 miles away). Touch for a list and map of all markers in Newark.

Another marker is no longer nearby. The Judge Morris Estate (was approx. 1.8 miles away but has been replaced with another marker now near it).

Also see . . . Delaware Boundary Markers - National Register of Historic Places Nomination Form.

Perhaps the most significant aspect of the Mason-Dixon survey is its symbolic importance. Beginning at the "Post Marked West" in northwestern Delaware, the survey defines the southern boundary of Pennsylvania, a line that later became the symbolic division between slave and free states.

(Submitted on May 12, 2025, by Pete Skillman of Townsend, Delaware.)

Site of Post Mark'd West Marker northern face image. Click for full size.

Photographed by Pete Skillman, March 25, 2024

2. Site of Post Mark'd West Marker northern face

Site of Post Mark'd West Marker western face image. Click for full size.

Photographed by Pete Skillman, March 25, 2024

3. Site of Post Mark'd West Marker western face

Site of Post Mark'd West Marker wide view image. Click for full size.

Photographed by Pete Skillman, March 25, 2024

4. Site of Post Mark'd West Marker wide view

Credits. This page was last revised on May 12, 2025. It was originally submitted on March 25, 2024, by Pete Skillman of Townsend, Delaware. This page has been viewed 551 times since then and 35 times this year. Photos: 1, 2, 3, 4. submitted on March 25, 2024, by Pete Skillman of Townsend, Delaware. • Bill Pfingsten was the editor who published this page.