All of the following graves are marked as Confederate soldiers. Need help in unit ID.

Crown Hill Cemetery,Clifton Forge,Va.:
Quinlin,Thomas J. (1830-1874)

Oakland Presbyterian Church Cemetery,Alleghany Co.,Va.:
Bsker,David P. (d. 12/16/1905)
Lassiter,L. (b.?,d.?)
Nuckols,Edwin M. (b.?,d.?)