 Robert Spaethling, who translated Mozart's letters, typically takes a position strongly sympathetic to Wolfgang in his struggles with his father; he describes
Wolfgang's resignation of his Salzburg position and marriage to Constanze as a two-act "drama of liberation from Salzburg, specially Wolfgang's liberation from Leopold Mozart".Leopold Mozart's music is inevitably overshadowed by the work of his son Wolfgang, and in any case the father willingly sacrificed his own career to promote his son's.But his "Cassation in G for Orchestra and Toys" (Toy Symphony), (also variously attributed to Joseph Haydn, Michael Haydn, and Austrian Benedictine monk Edmund Angerer) remains popular, and a number of symphonies, a trumpet concerto, and other works also survive.