...nd a numerically superior force of rebels under General Marmaduke, resulting, after a contest of more than ten hours duration, in a retreat of the latter. The loss was nearly equal on both sides.--( Doc . 98.) Yesterday a large reconnoitring force of Union troops, under the command of Major Wm. P. Hall, embarked at Yorktown, Va., on board the fleet of gunboats and transports, under the command ...