Statistics for occurrence #1 of “Sullivan's Island” in chapter 26, page 437 of Alfred Roman, The military operations of General Beauregard in the war between the states, 1861 to 1865:
...m the enemy's shots.
The small steam-engine for making fresh water is in rather an exposed position.
It ought to be removed to a safer place or be properly protected.
Battery Beauregard, across Sullivan's Island , in advance of Fort Moultrie, to defend the approach from the east, is armed with five guns.
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