What kind of event requires three generations of a family to travel together? A weekly or monthly shopping excursion might have brought dad to town for business at the courthouse (filing a deed, paying taxes, obtaining a permit, perhaps even jury duty); mom and the kids, to the department or other stores; grandmother for church work or to visit a friend at the hospital. The entire group could also be going to church for a regular Sunday service; dressed differently—in darker more reserved clothes—they might attend a wake or a funeral. But the real questions are more basic: Why did the group pose for a photograph in the first place?
Also what’s the horse’s name?