Issues : Uncertain notes on ledger lines
composition: WN 17, Polonaise in B♭ major
a1 as the highest note of the chord is most probably an error of JC; it is revealed by f1 which is featured both in EF and PE. Analogously, the compatible presence of the c1 note in this chord in JC and PE leads to a conclusion that its omission is probably an error of EF. In the main text we give the version of PE, which does not raise any doubts.
category imprint: Differences between sources