I have played these Sonatas briefly just once with
Bettina Kiefner whilst on a "Re-union visit" to her and
Elisabeth Book in Münster, Germans in May 2000. The sonatas comprise
- Sonata V in F major (Allegro, Grave, Allegro)
- Sonata VI in D minor (Adagio, Allegro, Largo, Allegro)
- Sonata VII in F major (Allegro, Largo, Allegro, Grave, Allegro)
- Sonata VIII in F major (Andante, Presto)
They have much the same character as the sonatas I am very familiar with in
Zwölf Sonaten IX-XII.