||Jessen's text was the winner of a competition on a new Danish national anthem held in 1818 by the society, 'Selskabet til de skiønne og nyttige Videnskabers Forfremmelse' (The Society for the promotion of the fine and useful arts).
The winner of the subsequent competition for the best tune was Nationalsang by Christoph Ernst Friedrich Weyse (1774-1842). This song, however, never became a national anthem. Gerson's tune may have been among the 24 submitted compositions. At least its settings adhere more or less to the competition conditions: a score for grand orchestra, a score for a military wind orchestra, and a score for 3-4 singers with piano accompaniment. Further studies in the archive of the society are required. See Jørgen Poul Erichsen, Den kronede danske nationalsang fra 1819 og hvad deraf fulgte, en litterær pennefejde med et musikalsk efterspil in'Fund og Forskning', vol. 22, 1976.
The instrument corno basso was developed from the serpent around 1800. See Curt Sachs, Handbuch der Musikinstrumentenkunde, Leipzig 1930, p. 264f and the German Wikipedia article on Basshorn.
Today there are two official Danish national anthems, Kong Christian stod ved højen mast and Der er et yndigt land. The text of the latter was written 1819 by the poet Adam Oehlenschläger (1779-1850), in the year of the above mentioned competition. It's unknown, however, whether the poem was submitted to the competition. The tune used today was written 1835 by Hans Ernst Krøyer (1798-1879).