From Charleston.
Charleston, Nov. 18.
--A slow but steady fire has been kept up on Fort Sumter last night and this morning from the enemy's mortar batteries.
Everything else quiet.--No casualties at Sumter for the past two days. Major Elliott and the garrison are all well.
[second Dispatch.]
Charleston, Nov. 18. P. M.
--The firing on Fort Sumter continues steady.
Our mortar battery on Sullivan's Island has been shelling Gregg and the Cummings Point batteries all day. No casualties at Sumter to-day.
The enemy fired at long range to-day up Cooper river at a passing steamer, it is supposed with one of the same guns with which they have been firing into the city.