From Northern Virginia.
The latest advices from Northern Virginia represent matters as unchanged with the army of Gen. Lee. A portion of our forces are reported to be busily engaged in removing the iron from the Orange and Alexandria Railroad. Occasionally they are interrupted by the enemy, when a skirmish occurs, resulting in nothing decisive on either side.--On Sunday last we understand there was a considerable cavalry fight north of the Rappahannock river between Gen. Stuart and a portion of the enemy's cavalry. Of the result of the fight we could learn nothing last night.