A drawing of the same model playing a harp seated in the opposite direction, in the same technique and of similar size, is in the Foundation Custodia, Institut Néerlandais, Paris (A. Staring, Jacob de Wit 1695-1754, Amsterdam, 1958, no. 10, illustrated). Staring (op.cit.) suggests that both may be related to studies De Wit made in 1770 for decorations in the Mozes en Aäronkerk, Amsterdam