Pvt. David F. Wilson, resident of Brooks County, enlisted August 14, 1861 at Brunswick, Ga in Capt. William A. Lane's Company (Piscola Volunteers) 13th Regiment Georgia Infantry which was successvilly designated as Captain Lane's Company and (New) Company I, 13th Regiment Georgia Infantry and Company C, 26th Regiment, Georgia Infantry
It would appear that the last surviving muster role for the Company was for the months of Jan/Feb 1862 in which he was recorded present. It seems he was on detached service for some time as he was paid for the months of March through October 1862 at Staunton (VA)by another QM. The pay voucher contains his signature.
I suggest you obtain his service record file along with the others you mention, which can be accomplished by a service noted at the top of this page.
26th Infantry Regiment [also called 13th Regiment] completed its organization in October, 1861, at Brunswick, Georgia. Its companies were recruited in the couties of Charlton, Berrien, Glynn, Twiggs, Clinch, Ware, Coffee, and Wayne. After serving in the Department of Georgia at St. Simons Island and Savannah, the unit moved to Virginia where it was brigaded under Generals Lawton, John B. Gordon, and C.A. Evans. The 26th participated in the campaigns of the Army of Northern Virginia from the Seven Days' Battles to Cold Harbor, fought with Early in the Shenandoah Valley, and ended the war at Appomattox. This regiment came to Virginia with 1,100 officers and men, lost 37 killed and 87 wounded at Second Manassas, and reported 6 killed, 49 wounded, and 6 missing at Sharpsburg. It had 53 casualties at Fredericksburg and 12 at Second Winchester. The unit was detached from its brigade to support the artillery at Gettysburg and lost few casualties. On April 9, 1865, it surrendered 85 men, of which 4 officers and 34 men were armed. The field officers were Colonels Edmund N. Atkinson and Carey W. Styles; Lieutenant Colonels James S. Blain, Eli S. Griffin, William A. Lane, and William A. McDonald; and Majors Thomas N. Gardner and B.F. Grace.