CannonDry Tortugas National Park; National Park ServiceBack: ACC 29; I think this is about a 20 pounder. Darnels are Conn. I don't know the caliber of this or the gren at Guilford the pictures do provide a pretty good idea of the carriages regardless of size. They all appear about the same construction.
CannonDry Tortugas National Park; National Park ServiceBack: ACC 29; White Point gardens Charleston, S.C. 10 or 10 1/2" Bore Dahlgren; Caseinate Carriage