From Charleston — a steamer ashore.
Charleston, March 19
--There are no signs yet of the anticipated attack.
The weather is rough and threatening.
The iron screw steamer Georgiana, from Nassau with a valuable cargo, including four Slakely guns, was chased ashore by the blockaders on Long Island beach, before daylight this morning, and badly riddled by Yankee shot.--The crew took to the boats, and have reached the city.
The Georgiana was owned by English parties.