Alastair Laing has kindly confirmed the attribution on examining the drawing in the original. Mr Laing points out that the present drawing was probably the one engraved en manière de crayon by Demarteau with the inscription 'Boucher inv. del. 1769' (P. Jean-Richard, L'Oeuvre gravée de François Boucher dans la Collection Edmond de Rothschild, Paris, 1978, no. 770).
Mr Laing compares the drawing to a more elaborate version of the same subject in the Robert Lehman Collection in the Metropolitan Museum of Art (M. Taverner Holmes and D. Posner, Fifteenth- to Eighteenth-Century European Drawings in the Robert Lehman Collection, New York, 1999, no. 118), which is related to the picture painted for Sireul and sold in his posthumous sale, Paris, 3 December 1781, lot 25 (A. Ananoff, François Boucher, Lausanne and Paris, 1976, no. 269). The Sireul picture, now lost, was copied as a miniature by Charlier for the Prince de Conti, now in the Wallace Collection (J. Ingamells, The Wallace Collection, Catalogue of Pictures, London, 1989, III, inv. no. P474, pp. 115-6).
We are very grateful to Alaistair Laing for his help in preparing this entry.