Introduktion und Fuge [Introduction & Fugue] WoO.25 (1866). Listen to the complete work
Published: 1867, Rieter-Biedermann.

Score of Repos de l’Etude WoO.20D

Kleine Phantasie über den Propheten [Little Fantasy on Le Prophète] WoO.12C (1849-50).
Unpublished. LOST. The work may have been for trombone and piano.

Repos de l’Etude [Breaks from Study] WoO.20D (1856-57).
Published: 1857-58, Schott, as the work of the recently-deceased Joseph Küffner, continuing an already-established series. Vols. 16 & 17 may be LOST.

• Volume 13: Il Trovatore by Verdi.
     No.1 Allegro moderato quasi Marcia—Presto.
     No.2 Maestoso—Largo—Allegro.
     No.3 Adagio—Allegro agitato.
• Volume 14: La Traviata by Verdi.
     No.1 Maestoso—Allegro non troppo.
     No.2 Allegro assai vivo.
     No.3 Allegro vivacissimo—Andante—Allegro.
• Volume 15: Rigoletto by Verdi.
     No.1 Adagio—Allegro.
     No.2 Andante—Moderato.
     No.3 Andante—Allegro moderato.
• Volume 16: L’Etoile du Nord by Meyerbeer.
• Volume 17: Les Vêpres siciliennes by Verdi.

Kanon in Unterquarte und Obersepte [Canon in Lower Fourths and Upper Sevenths] WoO.17B (1855).
Unpublished sketch in five un-named staves.