Statistics for occurrence #1 of “Washington, D. C.” in chapter 34 of Admiral David D. Porter, The Naval History of the Civil War.:

.... I have the honor to be, very respectfully, Your most obedient servant, S. F. Dupont, Flag-Officer, Commanding South Atlantic Blockading Squadron. Hon. Gideon Welles, Secretary of the Navy, Washington, D. C. P. S.--Bearer of dispatches will also carry with him the first American ensign raised upon the soil of South Carolina since the rebellion broke out. S. F. D. Flag-Ship Wabash, ...
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