Susan Coolidge

Sarah Chauncey Woolsey (January 29, 1835 – April 9, 1905), known by her pen name Susan Coolidge, was an American children's author, known for her novel What Katy Did (1872).

Woolsey was born on January 29, 1835, in Cleveland, Ohio, to John Mumford Woolsey and Jane Andrews. She was a member of the wealthy New England Dwight family, and author and poet Gamel Woolsey was her niece. Her family moved to New Haven, Connecticut, in 1852.

Woolsey worked as a nurse during the American Civil War (1861–1865), after which she started to write. She never married, and resided at her family home in Newport, Rhode Island, until her death. She edited The Autobiography and Correspondence of Mrs. Delaney (1879) and The Diary and Letters of Frances Burney (1880).