After looking very closely I later discovered a couple markings on the sword which were on the flat edges of the ricasso. One side had a crown with the number 21 below, the other side the name..Mole. Doing a bit of research, I found that you are obviously correct in that it is of British (England) manufacture. From what I could glean, there was an importer named Robert Mole who brought arms from England, many for the confederacy..probably before the civil war. The monogram on the cast handle is likely RM..for Robert Mole.
Although the last few inches of the tip is quite rusty, causing the edge to be slightly serrated, 18.6" in length. No sheath, and those pointed parts of the cast handle came down over the sheath, with ricassos behind and in sheath. Overall length 24"+, Handgrip slightly small for my extra large hands.
I just bought a new camera, and would post some new and better pics, except I am struggling with "shrinking" the photos. Yes, i have found the photo share sites, but I am still struggling.
Oh well, that's what I get for being an old codger.
I also have a brass "fishscale" Ames. I don't believe it is the artillery sword, since it does not have the blade which widens as it goes toward the tip, the blade being shaped much like the Mole sword..plus it is in much nicer condition.