Dave spencer

Quick greetings to all from a newbie. Located near Darwin in the Northern Territory of Australia. Into black powder and hunting when I have time, feral pigs and occasionally buffalo. Am looking for anyone who may have info on F Barnes and Co pistols. I have a .45 under and over pistol, percussion cap I have been trying to find out about. Story is came out to Australia in 1838 or thereabouts. Have not had any luck so far. Cheers.