anyone have knowledge about a gunmaker from Buffalo, NY named Patrick Smith. I have a family heirloom rifle with mark that reads P. Smith Buffalo 1848. I've done a little research and found that he was a fairly important maker in the early to mid 19th Century. Maybe .54 cal? Its a half round half octagonal barrel. Any additional information would be appreciated. I'd like to have it appraised for an insurance value, but I don't know where to start. I live in Kansas City.