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.:

...f one mile and more. [See Vol. II., p. 9.] But the fact that we could throw heavier metal and do heavier work now than we could then, promised success, and the placing of guns in position against Fort Sumter was promptly begun. For this purpose 16 Parrott rifles and two Whitworth rifles were placed in batteries at distances from Fort Sumter ranging from 3428 to 4290 yards. The slow, tedious, and hazard...
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