Dover

1993

1:24k

Dover

1956

1:24k

Dover

1956

1:24k

Dover

1956

1:24k

Duck Creek.

1868

Beers, D. G.

1:63k

Wyoming

1931

1:63k

Wyoming

1930

1:63k

Wyoming

1926

1:48k

Little Creek, Dover (hundreds)

1868

Beers, D. G.

1:63k

Delaware Bay Middle Sheet

1846

C&GS

1:80k