Input (grade 8): The libretto, written by W. H. Auden and Chester Kallman, is based loosely on the eight paintings and engravings A Rake's Progress (1733 1735) of William Hogarth, which Stravinsky had seen on May 2, 1947, in a Chicago exhibition.
Output (grade 7): The libretto written by W. H. Auden and Chester Kallman is based loosely on the eight paintings and engravings from the 18th century by William Hogarth called A Rake's Progress.