Lady Henry Somerset and T.P. O’Connor in a garden distributing cabbages to children, between ca. 1910 and ca. 1915, Bain News Service, via Library of Congress, Prints and Photographs Division.
Lady Henry (born Lady Isabel Cocks) was an heiress who married the second son of the Duke of Beaufort. After the couple separated, she turned to charity work on her various properties. She later became president of the British Women’s Temperance Association and a campaigner for birth control and women’s suffrage. In 1913, the readers of the London Evening News voted her their choice for first female prime minister of the United Kingdom.
Thomas Power O’Connor was an Irish journalist who founded and edited several newspapers in London. He was also a member of Parliament for the Irish Nationalist Party and later as an independent (representing Galway and then Liverpool).
I cannot tell what plants are growing in the flower (?) beds, but they are sectioned off — perhaps by bloom color?
The house was a split level. You can see the two-story side here.
Edward Everett McCall was a Justice of the Supreme Court of New York. He also ran unsuccessfully for mayor of New York City as the Tammany candidate. He died in 1924, and his seaside house burned down three years later.