Sarah Chauncey Woolsey (1835-1905) was an American children's author who wrote under the pen name Susan Coolidge. She was born in Cleveland, Ohio and spent much of her childhood in New Haven Connecticut. She worked as a nurse during the American Civil War (1861-1865), after which she started to write. Woolsey never married, and resided at her family home in Newport, R.I., until her death. She is best known for her classic children's novel What Katy...