From Charleston — furious bombardment.
Charleston, Aug. 18.
--All day yesterday the bombardment was more furious than on any previous day. The Ironsides, six monitors, and six gunboats, with all the enemy's land batteries, opened on Battery Wagner at daybreak, throwing twenty shells per minute at our works.
This continued until 11 o'clock when the fleet and land batteries turned their attention to Fort Sumter.
The Ironsides and six monitors approached within three-quarters of a mile of Sumter and battered vigorously against the South face of the fort.
Sumter replied briskly from her barbette guns.
The contest lasted about three hours, when the fleet, having been struck very often, stood out of range, with flags at half-mast.
It is supposed some high Yankee naval officer has been killed.
The enemy's land batteries of 200 pounder Parrott guns kept up a constant fire yesterday evening and all last night against Sumter.
The roar of cannon beard in the city was tremendous.
The casualties at Sumter yesterday were one killed and thirteen wounded; at Battery Wagner, seven killed and twenty-four wounded. Among the killed is Capt. Wampler, of Va., chief engineer at Wagner.
The cannonade was resumed at daybreak this morning, and now, at 9 o'clock A. M., is progressing with great vigor.
Batteries Gregg and Wagner are unimpaired. 