...army from Fairfax Court House and the positions which had been occupied in front of that place, a movement was made by the enemy to cross the Potomac near Leesburg, where we had, under the command of Brigadier General N. S. Evans of South Carolina, four regiments of infantry (i. e., the Thirteenth, Seventeenth, and Eighteenth Mississippi, and the Eighth Virginia), commanded respectively by Colonels Barksdale, Featherston, Bur...