...ssippi, were burned to-day in retaliation for an attack upon the steamer Catahoula by the rebels. A reconnoissance was this day made by a strong force of Union troops, under the command of General Geary , into Loudon County, Va. Several skirmishes took place with parties of the rebels, resulting in their retreat, leaving in the hands of the Unionists seventy-five prisoners, including a number of offi...