Found two 8" bore mortars at the Cemetary where I was looking for a cannon for Starr. Markings on the Muzzle of the first I photographed are from left to bottom, to right to top quarter. No 42. J. M. A. 1865. C. A. & Co 1032 lb. The trunions are 10" in diameter two drilled vents visible, unable to probe due to the mortar being filled with concrete Vent diameters (according to my 43 year old eyes and a pocket scale) is 15/64. Barrel length from muzzle to the outside edge of the elevation "ladder" is 20 inches. There is a "lifting eye" six inches up the radius towards the muzzle. Muzzle wall thickness is 4", so the diameter of this piece is 16". The second Mortar has identical dimentions and Markings, except the second one is No 43 and has a weight of 1037 lb. They are obviously cast pieces and smoothbore a short section is visible. Pics that I took are below.