"The Allegro con Spirito" movement of the Divertimento No. 1 in B-flat is originally from the Six Feldpartiten (open air suites), composed Franz Joseph Haydn in the early 1780s. Originally scored for two oboes, two French horns, three bassoons, and a B-flat serpent, this piece works beautifully as a clarinet quartet and may be performed by four clarinet players or three clarinet players and one bass clarinet player. (3:00)