"An Adventure" by C. A. E. Moberly and Eleanor F. Jourdain is a book published in 1911 under pseudonyms. The work recounts an extraordinary visit to Versailles's Petit Trianon in August 1901, where the two Oxford academics claimed to witness eighteenth-century gardens and encounter mysterious figures, including what they believed to be the ghost of Marie Antoinette herself. Their account of apparent time travel caused both sensation and controversy upon publication. (This is an automatically generated summary.)