Yes, the Washington Artillery served with the Army of Northern Virginia. However, I do not find a Chaplain in the roster. The nearest I find is

J. H. Chapman, Cannoneer, 6th Company, Battalion Washington Artillery, recorded on a roll dated April 3, 1862 at New Orleans, no other records

This company was organized in April, 1862, disbanded later in 1862.

I find one Washington Artillery soldier buried at Winchester. Difficult to read his headstone for comparison.

John Muntinger, Private, 1st Company, Battalion Washington Artillery, died at Winchester of wounds received at Sharpsburg October 24/28, 1862

M320: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Louisiana

.........

J. Muntinger
Memorial
Photos
Flowers
Edit
Share
Birth: unknown
Death: Oct. 30, 1862

CSA: Washington Arty. Aged 19, years.

Birth: 24 June 1843, Eltingen, Wurttemburg, Germany
Name at birth: Johannes Mundinger; Emigrated to New Orleans in 1852; Enlisted as John Muntinger, Private Company 1, Battn. Washington Artillery, Lousiana.

Burial:
Stonewall Confederate Cemetery
Winchester
Winchester City
Virginia, USA
Plot: Louisiana, 8

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=19210073