I have a JP Clabrough & Bros London with an engraved stock shield. The shield is engrave with “Dr. A.M. Barr Philadelphia PA”. Lately I’ve been doing a lot work of family heirloom guns and seeing how important the family gun legacies are to people. It would be neat to find decedents of Dr. Barr’s if possible. Where would folks suggest looking for a person from a 100 years ago or so? Thank you.