J.V. Gertner: Drawing after the relief, D366, dated “Kjøbenhavn Januar 1840”.
Adam Oehlenschläger: Poem for Thorvaldsen dated 8.3.1840.
Ferdinand Richardt: Thorvaldsen in his studio at the Academy of Fine Arts in Copenhagen, 1840, B285 (the relief is placed on the floor to the left, leaning up the wall).
Rigmor Stampe (ed.): Baronesse Stampes Erindringer om Thorvaldsen, Copenhagen 1912, p. 50.
Thiele IV, p. 151 (erroneously dates the relief to the following New Year, 1.1.1841).