C.W. Eckersberg’s entry in his diary of this date, published in: Villads Villadsen: C.W. Eckersbergs dagbøger 1810-1837, Copenhagen 2009, vol. 1, p. 120 (documents the departure of the Knudtzon brothers from Rome).
The song Normand, som i Kampen bold by NN (in a booklet of songs, used in March 1816 according to an inscription).