The enemy at Piketon, Ky.
--The Tazewell (Va.) Democrat says:‘ The latest advices represent the Yankee force at this place previous to the great freshet not to exceed 1,000. They were busily engaged in transporting wagons, teams, and commissary stores up the Louisa Fork, as if preparing for a forward movement. We farther learn from reliable sources that their entire strength in the Sandy Valley amounts to 7,000.
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