 Songs (with Piano); VII. Spiritual Songs; 
          VIII. Piano Pieces for Two and Four Hands; IX. Chamber Music for Two or More Instruments; X. Melodramas; and XI. Organ. 
          In addition, the later head of The Royal Library’s music department, Svenn Lunn (1903–1969), 
          prepared a chronological catalogue and an alphabetical list of song titles and first lines. 
          Finally, in 1991 the music antiquarian Dan Fog (1919–2000) published his <em>Hartmann-Katalog. Fortegnelse ove