Good point. I've found reference that Poague received two ten pounder Parrotts (not 20's) that were captured from Rickett's Battery after 1st Manassas. He returned two of the Cadet guns to VMI. The Bradley Schmehl print is supposed to be a scene at Port Republic with the guns overlooking the North River. This was of course some time after Manassas. However some other references I have read indicate that Poague still used the six pounders (all four) as late as 1864 at Spotsylvania and even later in the defenses around Richmond. I know the four six pounders were captured at least once but were retaken. It was not uncommon for batteries to be supplied with guns at their availability. I know the Third Richmond Howitzers had two ten pdr. Parrots and two 12 pdr. howitzers at Big Bethel but they fielded four 3 inch ordnance rifles at Gettysburg. I know the many historical artists try to be as accurate as their research allows them but as I posted in this original thread Schmehl shows sleeve rank on the cannoneers as patches and this was not accurate for the Confederate soldier.
Third Richmond Howitzers
(six pdr. smoothbore, hehehe)