The complete organ sonatas of Gustav Merkel - Merkel, Gustav 1827-1885 (Priory Records, 1997)
Enth.: Overture in C minor, op. 123. Sonata No. 4 und No. 5. Fantasie No. 4 und No. 5. Adagio in E major, op. 35. Organ sonata in D minor for four hands and double pedals, op. 30, "Preis-Sonate". - Orgel der Peterborough Cathedral.