Saturday, August 20.-We spent the day in camp. I corrected some maps. Oltmanns copied part of battle of Monocacy and Robinson copied a Valley map. It rained and misted most of the day. We had some skirmishing with the enemy along the Opequon. Camps as yesterday.

Sunday, August 21.-We moved toward Charlestown at an early hour. Drove the enemy from the Opequon. Met their infantry skirmishers at Aldridge's about 9.30 a.m. Rodes was in front and threw out his skirmishers and drove the enemy to the vicinity of Charlestown. Ramseur was put on his right and advanced to near the Summit Point road. Anderson came by the old Winchester and Charlestown road and Fitz Lee by the Berryville road. They had some fighting near Summit Point. We advanced by Smithfield. It threatened rain some, but cleared off by noon. Lomax, with Vaughn, Johnson, and Jackson, advanced by Leetown and then toward Summit Point with part of his force from Smithfield. Gordon was put on the right and Wharton on the left of the pike in reserve. We skirmished with the enemy during the p.m. and used some artillery. They made some advances, but were repulsed. We encamped some two and a half miles from Charlestown. A fine day. I reconnoitered positions, &c.

Monday, August 22.-We advanced at an early hour and found the enemy gone, leaving only cavalry behind. We soon drove them off, and three miles beyond Charlestown. Anderson and Fitz Lee came to vicinity of Charlestown, and our cavalry was thrown out toward Shepherdstown and toward the Shenandoah. It rained very hard for several hours in the p.m. I dined at Mr. Strider's. Robinson copied map for General Kershaw in p.m. and night. Headquarters near Davenport's.