From Charleston.
Charleston, Feb. 22.
--Two more wooden gunboats have joined the fleet inside the bar. In other respects the fleet remains unchanged.
The blockading vessel sunk during the heavy blow last week was a heavy draft three-masted propeller.
She appears to be sunk in five fathoms of water, and lies off Cumming's Point buoy.
The embrasures of the Yankee batteries on Morris's Island have been enlarged, affording greater facilities for their guns to assist in defence against an attack from our side.
Eighty-eight shells were fired at the city on Saturday, and twenty-four yesterday.
Five Yankees who came into our lines on Saturday were here yesterday evening.