1946
Jean, Sally
1862
SMITH, George M.D., of Pennsylvania
1902
Gannett, Henry; Wilson, H. M.; US Coast and Geodetic Survey; Geological Survey of New Jersey
1:63k
1899
C&GS
1:80k
1837
Woodbridge, William C.
1860
Beers, S.N.
1:63k
1857
Rogers, Henry Darwin
1:317k
1958
Brandywine Valley Association
1872
Gray, Ormando Willis; Walling, H. F.
1:300k
1777
Will, Johann Martin