J.V. Gertner: Drawing after the relief, D364, dated “Nysøe December 29th, 1839”.
Albert Repholtz: Thorvaldsen og Nysø, Copenhagen 1911, p. 38-39.
Rigmor Stampe (ed.): Baronesse Stampes Erindringer om Thorvaldsen, Copenhagen 1912, p. 49 (refers to an autograph date on the relief: 28.12.1839, which is not visible on the cast of the relief at THM, A563).
Thiele IV, p. 114-115 (dates the relief incorrectly to the spring of 1840).
In 1842 C.F. Holbech executes the marble version of the relief in Rome.