Me- I would try and group the photos. If you notice the same person(s) who seems prolific, group them all together. I would assume family. Male and female, relatively same age, I would assume husband and wife. Photography of the past is not like today. It was used to document. Look at backgrounds for hints of location. Differences in age for hints of relationships. You will probably be surprised what you piece together when you compare the photos to your genealogy research that will no doubt coordinate w/ the timeline and people you know are family.