Columbia subject headings:
Alexandria County (Va.)--History.
Washington Region.
Harvard subject headings:
Alexandria County (Va.)--History.
Alexandria County (Va.)--Politics and government.
United States--Capital and capitol.
Virginia. Act for the cession of ten miles square, or any lesser quantity of territory within this state, to the United States, in Congress assembled, for the permanent seat of the general government.
Washington (D.C.)--History
Princeton subject headings:
Alexandria County (Va.)--History.
District of Columbia--Area.