Lower Brandon.
--We have some additional items of the raid on "Lower Brandon." There are some twenty negroes yet left upon the estate. The mules not taken off were killed, and the meat not stolen was destroyed. Six of the negroes from "Upper Brandon," the seat of W B Harrison, Esq., while attempting to throw themselves into the arms of their Yankee brethren, were overhauled and are now in Prince George jail.