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Subject (Region)
- Massachusetts83
- Walden Woods39
- Merrimack River (N.H. and Mass.)38
- Walden Woods (Mass.)38
- Concord River (Mass.)37
- United States37
- Cape Cod (Mass.)33
- Maine24
- Piscataquis County (Me.)20
- New England17
- Concord River11
- Cape Cod10
- Québec (Province)9
- Concord River Valley (Mass.)6
- Merrimack River Valley (N.H. and Mass.)6
- Concord (Mass.)5
- Concord4
- Quebec (Province)3
- Québec (Province)3
- Walden Pond (Middlesex County, Mass.)3