Mary Shelley (1797-1851), the daughter of pioneering thinkers Mary Wollstonecraft and William Godwin, eloped with the poet Percy Shelley at the age of sixteen. Three years later, during a wet summer on Lake Geneva, Shelley famously wrote her masterpiece, Frankenstein . The years of her marriage were blighted by the deaths of three of her four children, and further tragedy followed in 1822, when Percy Shelley drowned in Italy. Following his death, Mary Shelley returned to England and continued to travel and write until her own death at the age of fifty-three.