Also known as: "The Cello"

This Study is famous becouse of the left-hand melody. It's a duet between two voices, more a nocturne than an etude. It bears a resemblance to the prelude in e flat minor from book 1 of J.S. Bach's Wohltemperirte Clavier.

Ronald Smith calls the form "a Sarabande which links the harmonic worlds of Bach and Wagner".

Stephan Heller wrote:" How I love these sombre and mysterious dreams, and Chopin is the god who creates them."

In Niecks opininion this piece is "A duet between a He and a She, of whom the former shows himself more talkative and emphatic than the latter, is, indeed, very sweet, but, perhaps, also somewhat tiresomely monotonous, as such tete-a-tetes naturally are to third parties."