... the southeast angle of the other two bisecting roads; from Sharpsburg, as an apex, this road crossed the Antietam at Burnside's bridge and forked when it reached higher ground; the upper fork led to Rohrersville and the other ran south into the Harper's Ferry road. A few miles above the regular crossing was a zigzag country road --sometimes named the diagonal. It intersected the Antietam at Newkirk and ...