Miss Jean Potter and Miss Charlotte Potter
Beach at Southampton.
There's a mention of "Miss Jean Potter and Miss Charlotte Potter" being "on the beach" at Southampton in summer 1922 (apparently visiting for the festivities surrounding a tennis tournament)
"Jean and Charlotte Potter" took part in a 1922 circus-themed fair at Agawam Park, to benefit Southampton Hospital (they helped run the roasted peanuts and popcorn concession).
The two Potter girls are also listed among the young women selling programs for a performance at the Parrish Art Museum in Southampton that year (New York Tribune, 3 September 1922).
I think they're the daughters of banker William Chapman Potter and Caroline Morton Potter, who were divorcing in 1922 (which might account for the girls' busy social calendar that year). Reports about the divorce mention they have two daughters, 17 and 19. Mrs. Potter was residing in Paris at the time.
They had a half-sister, Diana Guggenheim (1924-1991), aka Diane Hamilton
Jean Potter married artist Frederick Soldwedel; they divorced in 1930. Then she married Lt. Edmund C. Stout; she was widowed in 1943 when he died from an accidental gunshot wound in their home in Florida.
Charlotte Potter married Reginald M. Lewis in 1926, and divorced him in 1930; then she married a man named Atwood, as his second wife, c1932.
As well as the 1922 mention of the girls being "on the beach" in Southampton, they were at Southampton in 1913
It seems likely that this group of photos on a beach are all from Southampton, since Frances Breese lived here and Goodhue Livingston also had a house there.
Thanks Pennylrichardsca and Swanq on Flickr.com for these information about the lives of these lovely young women.