Princess Priscilla's Fortnight is a 1905 comedy-drama novel by the British writer Elizabeth von Arnim, known at the time as Elizabeth, Countess Russell. It was turned into a play The Cottage in the Air in 1909.
Elizabeth von Arnim (31 August 1866 – 9 February 1941), born Mary Annette Beauchamp, was an English novelist. Born in Australia, she married a German aristocrat, and her earliest works are set in Germany. Her first marriage made her Countess von Arnim-Schlagenthin and her second Elizabeth Russell, Countess Russell. After her first husband's death, she had a three-year affair with the writer H. G. Wells, then later married Frank Russell, elder brother of the Nobel prize-winner and philosopher Bertrand Russell. She was a cousin of the New Zealand-born writer Katherine Mansfield. Though known in early life as May, her first book introduced her to readers as Elizabeth, which she eventually became to friends and finally to family. Her writings are ascribed to Elizabeth von Arnim. She used the pseudonym Alice Cholmondeley for only one novel, Christine, published in 1917.