Statistics for occurrence #1 of “Flag-Officer Davis” in chapter 6 of Colonel Charles E. Hooker, Confederate Military History, a library of Confederate States Military History: Volume 12.2, Mississippi:

...to shorten his course to the Gulf. The bombardment continued day by day, but with less vigor, and on June 12th more than forty gunboats, mortar-boats and transports had arrived from Memphis under Flag-Officer Davis , above Vicksburg, and took part in the attack upon the batteries and city. Even the citizens who remained became accustomed to the steady dropping of shells, and went about their daily business. ...
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