Gertrude Käsebier (1852–1934) was one of the most influential American photographers of the early 20th century. She was known for her evocative images of motherhood, her powerful portraits of Native Americans and her promotion of photography as a career for women.
The bathing machine was a device popular in the 18th and 19th centuries to allow people to change out of their usual clothes, possibly change into swimwear and then wade in the ocean at beaches. Bathing machines were roofed and walled wooden carts rolled into the sea. The bathing machine was part of sea-bathing etiquette more rigorously enforced upon women than men but to be observed by both sexes among those who wished to be "proper."