The Moberly–Jourdain incident (also the Ghosts of Petit Trianon or Versailles, French: les fantômes du Trianon / les fantômes de Versailles) is a claim of time travel and hauntings made by Charlotte Anne Moberly (1846–1937) and Eleanor Jourdain (1863–1924).
In 1911, Moberly and Jourdain published a book entitled An Adventure under the names of "Elizabeth Morison" and "Frances Lamont". Their book describes a visit they made to the Petit Trianon, a small château in the grounds of the Palace of Versailles where they claimed to have seen the gardens as they had been in the late eighteenth century as well as ghosts, including Marie Antoinette and others. Their story caused a sensation and was subject to much ridicule.
Moberly, born in 1846, was the tenth of fifteen children. She came from a professional background; her father, George Moberly, was the headmaster of Winchester College and later Bishop of Salisbury. In 1886 Moberly became the first Principal of a hall of residence for young women, St. Hugh's College in Oxford. It became apparent that Moberly needed someone to help run the college, and Jourdain was asked to become Moberly's assistant.
Jourdain, born in 1863, was the eldest of ten children. Her father, the Reverend Francis Jourdain, was the vicar of Ashbourne in Derbyshire. She was the sister of art historian Margaret Jourdain and mathematician Philip Jourdain. She went to school in Manchester, unlike most girls of the time who were educated at home.