Source commentary: dr hab. Zofia Chechlińska

Impromptu in A flat major Op. 29 is the next volume of the series, catalogued with the number A III/29. The Impromptu autograph Stichvorlage in A flat major op. 29 is held in the Fryderyk Chopin Museum in Warsaw under the shelf-mark M-198, D-22. Chopin wrote four impromptus. The first in C sharp minor, dates from 1834 and was not published by the composer; the second, in A flat major, op. 29, was completed in 1837; the third, in F sharp major, Op. 36, was written in 1839; and the fourth and last, in G flat major, Op 51, was composed in 1842. The autograph of the Impromptu in A flat major, Op. 29 is the only extand autograph of this work.