From the North.
Petersburg, August 12.
--Northern papers of the 10th have been received. Unofficial dispatches claim a great victory for Averill over McCausland and Bradley Johnson, on the 7th, near Moorefield, Hardy county. Johnson and staff were captured, but escaped. They also claim between five and six hundred prisoners, trains, colors and small arms to have been captured.
The Commercial of the says Sherman and Thomas both telegraphed to Washington that Atlanta will fall this week certainly. A rebel wagon train of thirty-five wagons was captured in Loudoun county. There is nothing from the Army of the Potomac. Four expeditions entered Florida and destroyed railroads, burning bridges and committing other depredations. Gold 254½.
