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Subject (Region)
- District of Columbia[remove]41
- Virginia16
- Maryland15
- Pennsylvania9
- Chesapeake and Ohio Canal (District of Columbia/Maryland/West Virginia)7
- Great Britain5
- New York, New York5
- Ohio River5
- Potomac River5
- Boston, Massachusetts4
- France4
- Mexico4
- Missouri4
- Philadelphia, Pennsylvania4
- United States4
- Central America3
- Charlestown, Massachusetts3
- China3
- Denmark3
- Harpers Ferry, West Virginia3