Region
- United States 37 results
- Pennsylvania 9 results
- Delaware River Estuary 8 results
- Philadelphia 8 results
- Atlantic Coast 4 results
- États-Unis 4 results
- Massachusetts 3 results
- Fosterville (N.H.) 2 results
- New Hampshire 2 results
- Philadelphia (Pa.) 2 results
- Chesapeake Bay (Md. and Va.) 1 results
- New York 1 results
- Nineteenth century 1 results
- Penn 1 results
- Texas 1 results
- USA 1 results
- Washington (D.C.) 1 results