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- United States34
- United States. Congress. House20
- United States. Congress. Senate. Committee on the District of Columbia. (1816-1977)18
- United States. Congress. Senate17
- United States. Congress. House. Committee on the District of Columbia. (1808- )15
- United States. War Department12
- United States. War Department. Engineer Dept10
- United States. Army. Corps of Engineers7
- United States. Commissioners of the District of Columbia (1874-1967)6
- Babcock, J. W. (Joseph Weeks), 1850-19095
- Gallinger, Jacob H. (Jacob Harold), 1837-19185
- Maryland4
- United States. Department of the Treasury4
- Allen, Charles Julius, 1840-19153
- McMillan, James, 1838-19023
- Carter, Thomas Henry, 1854-19112
- Chapman, John G. (John Grant), 1798-18562
- District of Columbia2
- Scott, Nathan Bay, 1842-19242
- Sutherland, George, 1862-19422