Statistics for occurrence #1 of “Fort Sumter” in chapter 1.8 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 4.:

...e armament of that work and of Fort Moultrie with heavier calibers, including large rifles; by rebuilding and rearming old Fort Johnson, on James Island, on the south side of the inner harbor west of Fort Sumter ; by constructing several batteries on the shell beach south-east of Fort Johnson; by mounting some heavy rifles, including 13-inch Blakely guns, upon the lower water-front of the city; by building a ...
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