McClellan is writing that he could cut in behind Lee, and force Lee to cut his way out and the Confederates would break up before the could get out. And Lee concentrated his army and fought before that could happen.Very interesting thread. I just came across this line in McClellan's letters: "If he does go to Pennsylvania I feel quite confident that I can arrange things that the chances will be that he will never return." Sounds like McClellan was daring him to go into Pa!?!
 Civil War Papers of George B. McClellan, edited by Stephen W. Sears (New York: Ticknor & Fields, 1989), 449-450.