Susy Clemens.

About Susy Clemens

Olivia Susan Clemens was the second child and eldest 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, at 13 wrote her own biography of him, which he later published in his autobiography, and acted as a literary critic. Her father was heartbroken when she died of spinal meningitis at age 24.