...their dispersing columns, from day to day the Union columns converged in easy, cautious marches. At noon of the 13th, General Lee's order distributing his forces and a despatch from the Governor of Pennsylvania were handed General McClellan,--the former the celebrated lost despatch, given on a previous page,--the latter reading as follows: Harrisburg, Pa., September 13, 1862. Major-General George B. McCl...