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 9’ and ‘Fuga 9’ (Prelude and fugue in E major, BWV 878). In the hand of Anna Magdalena Bach, the final two bars of the prelude in the composer’s hand.