Statistics for occurrence #1 of “Confederate States of America” in chapter 57 of Admiral David D. Porter, The Naval History of the Civil War.:

...letter from the Confederate Secretary of the Navy. As Semmes had not heard of the occurrences at Petersburg, he was somewhat surprised at the contents of this epistle, which were as follows: Confederate States of America , Executive Office, Richmond, Va., April 2, 1865. Rear-Admiral Raphael Semmes, Commanding James River Squadron: Sir--General Lee advises the Government to withdraw from the city, and the officers ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.