Mozart's relationship with his Salzburg boss, the Archbishop, deteriorated over several years. When he got fired for the third time, Mozart decided enough was enough, and he took himself off to Vienna to be a freelancer. We'll hear Mozart's letter home after his final angry encounter with the Archbishop. And the Piano Concerto No. 9 that he had written for a friend, but which became a showpiece for himself, as he sought new jobs. Malcolm Bilson is the fortepianist in the final movement of Mozart's Piano Concerto No. 9, K. 271, with John Eliot Gardiner conducting the English Baroque Soloists.