Statistics for occurrence #1 of “Rear-Admiral Porter” in chapter 24 of Admiral David D. Porter, The Naval History of the Civil War.:

...p to Cairo for repairs, for what with being rammed and shaken up by constant firing of the guns, they required a thorough overhauling. There being at this moment no actual operations in progress, Rear-Admiral Porter devoted his attention to putting the vessels in thorough order, changing their batteries to Dahlgren guns, and adding a number of small stern-wheel vessels, covered with light iron (called tin-clads ...
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