**Print On Demand: This item will be printed at the time of ordering and may take several weeks to fulfill.
Chopin's four Impromptus originated in 1834-35 (Op. posth. 66), 1837 (Op. 29), 1840 (Op. 36) and 1843 (Op. 51). Their sources are quite numerous, comprising, as was usual for Chopin, not only parallel French, German and English editions, but also autograph manuscripts, copies and annotated scores belonging to former pupils which reveal refinements to chord spacing and articulation that arose in the course of Chopin's teaching.