J. S. Bach: ‘Praeludium 6’ and ‘Fuga. 6’ (Prelude and fugue in D minor, BWV 875). In the hand of Anna Magdalena Bach, with revisions in the hand of the composer.
J. S. Bach: ‘Praeludium 11’ and ‘Fuga 11’ (Prelude and fugue in F major, BWV 880). Autograph, with the first 19 bars of the prelude in the hand of Anna Magdalena Bach.