My Ggrandfather Luther R. Blair and his older brother William A.Y. Blair were in this unit:
Wright's Battery was organized in 1862 as the Halifax Artillery. It later served as Company C for De Gournay's Battalion (also known as the 12th Battalion Louisiana Heavy Artillery). This company remained in Virginia after the rest of the battalion was sent to Mississippi. It was known as Captain Samuel T. Wright's Company of the Virginia Heavy Artillery or Wright's Battery.
Organized for three years or the war in Halifax County on March 18, 1862.
Mustered in on March 22, 1862.
Served as Company C, 12th Louisiana Heavy Artillery Battalion.
Armed with four 12-lb. Napoleans on December 28, 1864.
Surrendered at Appomattox Court House on April 9, 1865.
Assignments: September-December 1862: Unattached, French's Command, Department of North Carolina and Southern Virginia
December 1862-February 1863: Pryor's Brigade, French's Command, Department of North Carolina and Southern Virginia
February-April 1863: Forces on the Blackwater, French's Command, Department of North Carolina and Southern Virginia
April-May 1863: Department of Southern Virginia
June-July 1863: Branch's Battalion, Artillery, Department of North Carolina
July-September 1863: Branch's Artillery Battalion, Ransom's Division, Department of Richmond
September 1863-June 1864: Branch's-Coit's Battalion, Artillery, Department of North Carolina
June-October 1864: Branch's-Coit's Battalion, Artillery, Department of North Carolina and Southern Virginia
October 1864-April 1865: Branch's-Coit's Battalion, Artillery, 4th Corps, Army of Northern Virginia
- See more at: http://www.americancivilwar101.com/…/va-art-batt-halifax.ht…
Battles:
Kelly's Store (January 30, 1863)
Swift Creek (May 9, 1864)
Drewry's Bluff (May 16, 1864)
Petersburg Siege (June 1864-April 1865)
Appomattox Court House (April 9, 1865)

William Addison Young Blair and younger brother Luther Rice Blair were in this unit:
Wright's Battery was organized in 1862 as the Halifax Artillery. It later served as Company C for De Gournay's Battalion (also known as the 12th Battalion Louisiana Heavy Artillery). This company remained in Virginia after the rest of the battalion was sent to Mississippi. It was known as Captain Samuel T. Wright's Company of the Virginia Heavy Artillery or Wright's Battery.Also rocket's.
Organized for three years or the war in Halifax County on March 18, 1862.
Mustered in on March 22, 1862.
Served as Company C, 12th Louisiana Heavy Artillery Battalion.
Armed with four 12-lb. Napoleans on December 28, 1864.
Surrendered at Appomattox Court House on April 9, 1865.
Assignments: September-December 1862: Unattached, French's Command, Department of North Carolina and Southern Virginia
December 1862-February 1863: Pryor's Brigade, French's Command, Department of North Carolina and Southern Virginia
February-April 1863: Forces on the Blackwater, French's Command, Department of North Carolina and Southern Virginia
April-May 1863: Department of Southern Virginia
June-July 1863: Branch's Battalion, Artillery, Department of North Carolina
July-September 1863: Branch's Artillery Battalion, Ransom's Division, Department of Richmond
September 1863-June 1864: Branch's-Coit's Battalion, Artillery, Department of North Carolina
June-October 1864: Branch's-Coit's Battalion, Artillery, Department of North Carolina and Southern Virginia
October 1864-April 1865: Branch's-Coit's Battalion, Artillery, 4th Corps, Army of Northern Virginia
- See more at: http://www.americancivilwar101.com/…/va-art-batt-halifax.ht…
Battles:
Kelly's Store (January 30, 1863)
Swift Creek (May 9, 1864)
Drewry's Bluff (May 16, 1864)
Petersburg Siege (June 1864-April 1865)
Appomattox Court House (April 9, 1865)

I think he was in Company F in the 34th Regiment. I think he died in a Richmond field hospital due to a wound he received in battle.