- COORDINATES: 39.8362847, -77.9061742 (approximate coordinates of where marker may have been).
- COUNTY: Franklin
- DISTANCE TO NEXT: ?
- EXPLANATION OF NAME: Named for General Hugh Mercer
- FOUNDED: 1750
- MANUFACTURER: ?
- SHAPE: Standard 1-sided
- STATUS: No known photos exist. Marker known only from inclusion in Clair Clawser's books.