Statistics for occurrence #1 of “Commodore Ingraham” in chapter 1.1 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 4.:

...e iron-clad fleet, on the 7th of April, was therefore 69, of which five were mortars. Two companies of infantry had been placed on Sullivan's and Morris islands, to guard against a land attack. Commodore Ingraham had also been cautioned to hold the gun-boats Palmetto State and Chicora in readiness to assist our batteries in case of need; but they were not needed. The approach of the monitors was slow and ...
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