Dr. Boon has kindly endorsed the attribution. The handling is comparable with other figure studies by Metsu at Amsterdam and in the Dutuit Collection, Petit Palais, Paris, K.G. Boon, Dutch Genre Drawings, Amsterdam, 1972, no. 65 and I.Q. van Regteren Altena, Gabriel Metsu as a Draughtsman, Master Drawings, 1963, I, pp. 13-9, pl. 8