Wolfgang Amadeus Mozart String Quartet in E-flat major, K. 428Henry Cowell String Quartet No. 3, MosaicFelix Mendelssohn String Quartet in F minor, Op. 80 The searching Mozart, the experimenting Cowell and the grieving Mendelssohn make up the winter program. In emulation of Haydn, Mozart seeks a more complex quartet style while Cowells Mosaic is just thatâ€”a free-form composition whose movements can be played in any order. Mendelssohns last major work before his death, the F minor quartet, is subtitled â€œRequiem for Fannyâ€ in memory of his beloved sister.