Statistics for occurrence #1 of “Washington, D. C.” in chapter 19 of Admiral David D. Porter, The Naval History of the Civil War.:

...a subject of more special commendation. I am, very respectfully, your obedient servant, D. G. Farragut, Flag-officer, Western Gulf Blockading Squadron. Hon. Gideon Welles, Secretary of the Navy, Washington, D. C. United States Flag-Ship Hartford, at anchor off New Orleans, April 29, 1862. Sir — I am happy to announce to you that our flag waves over both Forts Jackson and St. Philip, an...
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