...to company B of the Tenth Virginia regiment of infantry. This regiment had been on the Rappahannock, according to previous information.--Gen. Banks's Despatch. A body of National cavalry from Forsyth, Mo. , destroyed the rebel saltpetre manufactory near Yellville, Ark., this day. Lieut. Heacock, of the Fourth regiment of Iowa cavalry, was killed and one private wounded, in the fight with the rebels.--(...