McClellan's Letter to Robert E Lee

[Gene C]

Anyone ever heard of this before?

"In 1915 Captain John R King, who had commanded a company of the 6th Maryland Infantry during the war, told William Myers (McClellan's biographer) that, immediately after the battle of Antietam, McClellan had written a letter to his Confederate opponent, inviting him to a conference with a view to uniting both their armies and marching on Washington to end the war. McClellan would be dictator and Lee commander-in-chief. General Joe Davidson, who had been on Hooker's staff at Antietam, substantiated this story and arranged a meeting between Captain King and General James Longstreet, the ex-Confederate, who was then in Washington. King brought up the subject of the letter and Longstreet claimed to have seen it. Lee had sent for him, shown him the letter, and asked him what it meant, but Longstreet advised Lee to have nothing to do with it. Lee also showed it to Robert Toombs, who gave the same advice."

I read that in a book I am currently reading and have never heard of this before, and I have not found any other reference to it either.

Anyone know anything about it?