(Piano Collection). Contents: Prelude in F-sharp minor, Op. 23, No. 1 * Prelude in B-flat Major, Op. 23, No. 2 * Prelude in D minor, Op. 23, No. 3 * Prelude in D Major, Op. 23, No. 4 * Prelude in G minor, Op. 23, No. 5 * Prelude in E-flat Major, Op. 23, No. 6 * Prelude in C minor, Op. 23, No. 7 * Prelude in A-flat Major, Op. 23, No. 8 * Prelude in E-flat minor, Op. 23, No. 9 * Prelude in G-flat Major, Op. 23, No. 10