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Subject (Region)
- District of Columbia484
- United States224
- Puerto Rico190
- Alaska, Department and District of (1867-1912)188
- Great Britain185
- Philippines173
- Great Lakes152
- Mississippi River152
- Hawaii Territory (1898-1959)136
- France131
- Cuba119
- Mexico119
- California115
- Canada114
- New Mexico Territory (1850-1912)106
- Spain93
- Europe92
- Yellowstone National Park86
- Washington Aqueduct (District of Columbia)85
- China84