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Subject (Region)
- Virginia[remove]13
- Maryland8
- Pennsylvania7
- Ohio River5
- District of Columbia4
- Potomac River4
- Chesapeake and Ohio Canal (District of Columbia/Maryland/West Virginia)3
- Delaware3
- New York3
- Ohio3
- South Carolina3
- Baltimore, Maryland2
- Cumberland Road2
- Lake Erie2
- Maine2
- Massachusetts2
- Wheeling, West Virginia2
- Alabama1
- Allegheny River (New York/Pennsylvania)1
- Cacapon River (West Virginia)1