...quarters Schenck's brigade, Mountain Department, camp at Mt. Jackson, Va., June 12. Col. Albert Tracy, A. A.G.: I have the honor to report the part taken by the Ohio brigade, in the engagement at Cross Keys , on the eighth instant. It was about one o'clock P. M. when I arrived near the point of the road leading to Port Republic, where the advance-guard had already come upon the enemy. A staff-offic...