Miller is also mentioned in the Supplement to the Official Records of the Union and Confederate Armies, ed. by Janet B. Hewett, part II, vol. 33, serial no. 45 (Broadfoot, 1996), pp. 601-648. This is in connection with the battle of Gettysburg. Company E, on 2 July 1863, lost Sergeant J. M. Stricker, mortally wounded, died on 3 July. Also on 2 July, Captain I. D. Stamps, Private E. G. Baker and 10 others wounded, Sergeant Miller and four privates captured. It notes that Sergeant Miller escaped from Fort Delaware by swimming the Delaware river. On July 2, the company, with the regiment, charged the Peach Orchard on the Emmitsburg road, driving back in succession, the 68th Pennsylvania, 2nd New Hampshire, and 3rd Maine regiments. Reforming at the orchard while the remainder of Barksdale's brigade turned north, the 21st advanced on the Trostle buildings, taking five guns of the 9th Massachusetts Battery, and, continuing further east, captured four more guns from Battery I, 5th U.S. before turning back upon the advance of the 39th New York. The 21st lingered at the Trostle buildings before retiring and it may have been in this vicinity that Sergeant Miller was taken prisoner by the advancing Federal reinforcements. Captain Stamps was mortally wounded early in the action, in front of the Peach Orchard. The company order in the 21st evidently was not the usual B-G-K-E-H-C-I-D-F-A, since Company D was reported to be the left company of the regiment. However, Company E does appear to have been among the five companies in the left wing, since Captain Stamps was reportedly leading the left wing when he was struck down. My research shows that the left flank of the 21st came close to touching the Millerstown crossroad. That would suggest Company E along with Sergeant Miller crossed the Emmitsburg road just south of the Millerstown road, passing through the northwest corner of the Peach Orchard as it stands today (during the battle, part of the orchard was also north of the Millerstown road).