Rockbridge Artillery, No. 2; formerly called McDowell Guard
Capt. William K. Donald's Co. Va. Lt. Arty; formerly Co. B, 52nd Regt Va Inf

Capt William Keys Donald's Co Va Lt Arty
Rockbridge Artillery, No. 2; formerly Capt John M. Lusk's Co Va Lt Arty; formerly Capt John Miller's Co Va Lt Arty; originally Co B(1st), McDowell Guard, 52nd Regt Va Inf; detached from Regt, and constituted a light artillery company by S.O. No. 165, A&IGO, dated September 28, 1861. This company was reorganized May 1, 1862, under Capt Lusk, who resigned June 1, 1863; rolls indicate, however, that he commanded the company during the Gettysburg Campaign, evidently not having received notice of the acceptance of his resignation. The company served in McIntosh's Bn of Arty.
Captains: John Miller, John A.M. Lusk [elected 5/1/1862; resgnd 6/1/18630, William K. Donald

Source: A Guide to Virginia Military Organizations, 1861-1865, pg 18-19

NPS-CWS&SS shows:
Donald's Company, Virginia Light Artillery

Rockbridge Light Artillery No. 2 was organized as infantry served in the 52nd Regiment. All the officers and men were raised in Rockbridge County. In September, 1861, the company transferred to the artillery. After fighting at Camp Alleghany and in Jackson's Valley Campaign, it was assigned to R.A. Hardaway's, D.G. McIntosh's, and E.F. Moseley's Battalion of Artillery, Army of Northern Virginia. The unit fought with the army from the Seven Days' Battles to Cold Harbor, was active in the defense of Petersburg, and took part in the Appomattox Campaign. It reported 5 casualties at Camp Alleghany and 5 at Cross Keys and Port Republic. There were 7 wounded at Fredericksburg, and the company lost nine percent of the 67 engaged at Gettysburg. It surrendered 1 officer and 27 men. The captains were William K. Donald, John A.M. Lusk, and John Miller.

William K. Donald
Regiment Name Capt. Donald's Co., Virginia Light Art'y.
Side Confederate
Company
Soldier's Rank_In 1 Sergeant
Soldier's Rank_Out Captain
Film Number M382 roll 16

John A.M. Lusk
Regiment Name Capt. Donald's Co. Virginia Light Art'y.
Side Confederate
Company
Soldier's Rank_In 2 Lieutenant
Soldier's Rank_Out Captain
Film Number M382 roll 35

John Miller
Regiment Name Capt. Donald's Co., Virginia Light Artillery
Side Confederate
Company
Soldier's Rank_In Captain
Soldier's Rank_Out Private
Film Number M382 roll 38