...l retired in good order and took up the line in the edge of the wood nearest to camp. This was at about half-past 11 A. M. Gen. McClellan and staff rode upon the field at one P. M., escorted by Capt. McIntyre 's squadron of regular cavalry and the First regiment New-York volunteer cavalry, Col. McReynolds. He made his headquarters at Fair Oaks, where Heintzelman's had previously been, and there drew arou...