Dating old photographs provides clues to identifying your ancestors in the old family photos. The type of photo indicates the date a photo was taken. Photographs are  among some of the most treasured family heirlooms. Our children today grow up being photographed almost daily. Point a camera at a young child and they automatically smile. Check any teen or young adult or grandparent (!) and you are likely to find hundreds of photographs on their smartphone. [I think my great-grandmother Esther Richardson Talbott would have completely embraced the smartphone and its picture taking possibilities!] But this hasn’t always been the case. Having one’s photograph taken was an occasion that needed…