[Footnote: Hooker's unfinished report says he slept in the barn of D. R. Miller, but he places it on the east of the road, and the spot is fully identified as Poffenberger's by General Gibbon, who commanded the right brigade, and by Lieutenant-Colonel Rufus R. Dawes, Sixth Wisconsin (afterward Brevet Brigadier-General), both of whom subsequently visited the field and determined the positions.] Mansfield's corps (the Twelfth), marching as it did late in the night, kept further to the right than Hooker's, but moved on a nearly parallel course, and bivouacked on the farm of another J. Poffenberger, [Footnote: Official Records, vol. xix. pt. i. pp. 275, 475.] near the road which, branching from the Hagerstown turnpike at the Dunker Church, intersects the one running from Keedysville through Smoketown to the same turnpike about a mile north of Hooker's position. [Footnote: See map, p. 299.] On the Confederate side, Hood's division had been so roughly handled that it was replaced by two brigades of Ewell's division (commanded by Lawton), which with Jackson's own (commanded by J. R. Jones) had been led to the field from Harper's Ferry by Jackson, reaching Sharpsburg in the afternoon of the 16th. These divisions were formed on the left of D. H. Hill, and in continuation of his line along the turnpike, but with a brigade advanced to the East Wood, which was held as a salient. Hood's division, on being relieved, was placed in reserve near the Dunker Church, and spent part of the night in cooking rations, of which its supply had been short for a day or two. [Footnote: Official Records, vol. xix. pt. i. p. 923.] The combatants on both sides slept upon their arms, well knowing that the dawn would bring bloody work.