Thanks for the info Roy. The barrel says "made for W.Rawbone",so looks like it was made by someone else, probably in Birmingham.
The Julia Rawbone above is a beautiful gun, and was made by Westley Richards, so there could be a possibility that so was mine. But we will never know as there are no other marks on the gun except for Birmingham proof marks and the number 818 on the barrel and action. I will try to post more pictures, but getting this right seems to be eluding me.