... the Floating Battery, which lay beached on Sullivan's Island, under the command of Lieutenants Yates and Harleston; from Fort Moultrie, commanded by Colonel Ripley; from a powerful masked battery on Sullivan's Island , hidden by sand-hills and bushes, called the Dahlgren Battery, under Lieutenant J. R. Hamilton; and from nearly all the rest of the semicircle of military works arrayed around Fort Sumter for its re...