...road, came up and deployed to the left of Gen. Richardson, on the left of the road. Antietam creek, in this vicinity, is crossed by four stone bridges — the upper one on the Keedysville and Williamsport road; the second on the Keedysville and Sharpsburg turnpike, some two and a half miles below; the third about a mile below the second, on the Rohrersville and Sharpsburg road; and the fourth near the...