While meters and keys vary, the nocturnes are generally set in ternary form (A-B-A), featuring a melancholy mood, and a clear melody floating over a left-hand accompaniment of arpeggios or broken chords [REF].
The tempo marking of all but one of the nocturnes is a variation of Lento, Larghetto or Andante, the Allegretto of No. 3 breaking the mold.