In 1763, at the age of 17, Jones wrote the poem Caissa in Latin hexameters, based on a 658-line poem called "Scacchia, Ludus" published in 1527 by Marco Girolamo Vida, giving a mythical origin of chess that has become well known in the chess world.
Caissa has since been characterised as the "goddess" of chess, her name being used in several contexts in modern chess playing.