Susy Clemens

Olivia Susan Clemens, usually known as Susy Clemens (March 19, 1872 – August 18, 1896), was the second child and oldest daughter of Samuel Clemens, who wrote under the pen name Mark Twain, and his wife Olivia Langdon Clemens. She inspired some of her father's works, wrote her own biography of him that Twain later published as part of his autobiography, acted as a literary critic, and left him heartbroken when she died of spinal meningitis at age twenty-four.

Her biography of her father was published in 1988 in its entirety as Papa: An Intimate Biography of Mark Twain, a volume which also included a biography of Susy Clemens and her correspondence with her father.