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

...ieving Commodore J. K. Mitchell. The fleet as reorganized comprised the following named vessels: Virginia (iron-clad), flag-ship, four guns, Captain Dunnington; Richmond (iron-clad), four guns, Captain J. D. Johnson ; son; Fredericksburg (iron-clad), four guns, Captain Glasse; Hampton (wooden), two guns, Captain Wilson (late of the Alabama); Nansemond (wooden), two guns, Captain W. K. Butt; Roanoke (wooden) two g...
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