...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 officers, and about thirty ho...