From Northern Virginia.
Yesterday there was considerable skirmishing on our right, and slight skirmishing on our left. During the evening, Mahone, commanding Anderson's division, repelled an attack of the enemy on the left, and in turn charged them, capturing some prisoners.
This morning there is some artillery firing, but it amounts to very little.
Our troops are still in the best possible spirits.
[second Dispatch.]
There has been heavy fires to day, extending back several rules on the line of the Crutral Railroad, and it is conjectured the enemy are burning the track and depots.--It is also reported that the enemy are destroying the track between Milford and Chesterfield Depot, on the Fredericksburg road. This seems to indicate that Grant intends changing his base towards the Peninsula.