1.1 Duet in C Major, Op. 3, No. 1 1.2 Duet in E Flat Major, Op. 3, No. 2 1.3 Duet in C Major, Op. 3, No. 3 1.4 Duet in C Major, Op. 6, No. 1 1.5 Duet in C Major, Op. 14, No. 1 1.6 Duet in F Major, Op. 14, No. 2 1.7 Duet in E Flat Major, Op. 14, No. 3