Moorefield, Va. May 29, 1862. 12. M.
Gen. McDowell's advance, if not checked by the enemy, should, and probably will, be at Front-Royal by 12 (noon) to-morrow. His force, when up, will be about twenty thousand. Please have your force at Strasburg, or (if the route you are moving on does not lead to that point) as near Strasburg as the enemy may be, by the same time. Your despatch No. 30, received, and satisfactory.
A. LINCOLN