From Charleston

Correspondeuce of the N. Y, Herald lortress Monroe, August 6. The steamer Spaulding arrived here tbis mormng from Charleston, thence on the 4th inst., but brings no later newsthan that already forwarded by the Adlaide. The firing from the shore aud Monitor batteries are not as brisk as usual, the grand effort being reserved for a certain period. To-day, accordiog to the programmo laid down by Admiral Dahlgren and General Gilmore, soveral bat teiiiea that have been erected without being known to the rebels are to be unmasked, and then Sumpter will receive a taste of two and three hundred pounder Parrotts, and the result in the main depends upen the suecessful operations ot tbis monster ordnance. The shore batteries bearingon Fort Sumpter are being erected by sailors. The energetic Admirar has had npwaids of one thousand steady at work throwing up these intrenohments. General Gilmore, how.ever, has not been idle while the navy. has been at work. Our brave ttoops have been laboring zealoualy, notwithstaudini? their exposure to the ene.ny's murderous fire. Since th.e battcr.ies üavo been in the eourse of constructoin Fort Wagner bas remained almost unmolested. Prom competent aulhority, I learn that Gen. Gilmore could tako Battery Wagner at anv time ; but the fire from Fort Sumpter makes it untenaMe ; henee the neeessity of approacliing near enough to disable and silence the fort, after whioh he wiü uot only occupy Battesy Wagner, but also every other fortifieation, Fort Sump ter ioeluded. A few moinents before the departure of the mail boat from thia place the flag of truce steamer New' York, in charge of Major John E. Mulford, arrived from yny fomt, with 250 released prisoners. The Richmond papers of to-day have no telegraphic advices from Charleston ; but tbeir editorials sound doleful euough.- Ihey estímate the capturo of Charleston, at tlns time, would ba one of the severest calaimties that could befall their cause, and urge every man capable of bearinoarms to rush to the rcsoue and defense of the Palraetto City aud save it fxom he disgrace of falling inio the hands of ho '-Yankees.'' New York, Aug. 12. 1 he HeraWg Morris I8land correspondence, nnder date 5th and 7th reporta ur position stronger and safer than ever. f he morale and coufidence of our troops s unexampled. Althou!?h thfi wboU ceep pouring sliells frora Wagner, Sump er and other fortifications, the proteo ion of our troops is so complete that our asualities are hardly worth notieing Captain Paine, One Hundreth New York with nineof his men, were ciiptured by he rebels on the night of the 4th, while n a. scout near Liglit House Creek.- .hey made a spirited, but unsuecessful esistance, To superior numbers. Sunay week there was a terrifio engagement etween the gunboat Ottawa, a monitor nd the Ironsides and our works on Mor's Island, and the rebel forts. The ebel guns were finally silenced. A boat belonging to the Ironsides, while on picketjuty, last Wednesday night was run down by a rebel steamer. Part of the crew were drowned and the rest were saved by another of our boats. No prisoners were taken by the rebels.