Re: George Worden; Boston, MA
Photo is presumably a cabinet card, invented when the popularity of carte de visite waned in the 1880s. They lasted until the 1900s. They were photographs, some albumen, and others produced with a gelatin silver process, affixed to a 4 1/2 x 6 1/2 inch cardboard mount.This one is 4 x 6 with the photographer info at the bottom. If anyone could determine information about when the photographer was in business in Boston on Tremont Row, that might be the best clue.