Statistics for occurrence #1 of “Washington, D. C.” in chapter 20 of Admiral David D. Porter, The Naval History of the Civil War.:

...P. S.--By referring to pages 334 and 335--337, of Draper's history, you will find that he gives you all the credit claimed by your own report, as well as that given you by mine. D. G. F. Washington, D. C. , April 27, 1869. My Dear Admiral — I have received and carefully read your letter of the 3rd, in reply to mine of the 1st instant, and admit all you say about prominently mentioning my name...
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