Letter dated 5.9.1839 from H.C. Andersen to Henriette Hanck in: Svend Larsen (ed.): H.C. Andersens Brevveksling med Henriette Hanck 1830-1846, Part 4, Copenhagen 1945, p. 370.
Rigmor Stampe (ed.): Baronesse Stampes Erindringer om Thorvaldsen, Copenhagen 1912, p. 42.
Song dated 31.8.1839 from NN to Christian (8.) Frederik.
Other references
Viggo Sjøqvist (ed.): Kong Christian VIII.s dagbøger og optegnelser, III, 1823-1839, Regester, Copenhagen 1983, p. 178.