1900s Photo Family in swimsuits camping picnic in the woods 7x9 inches Cabinet Card NJ

Great photo from a Glassboro NJ estate.
It's a 7x5 inch heavy cardboard cabinet card with photo of a family, sitting and eating on the side of a hill in the woods. Some are in old swimsuits, two men are in suits with straw hats. Some of their clothing is hanging in the background.

No dates, names or maker's marking on the photo.

Excellent condition, lightly aged, tiny bit of wear on the rounded corners.