專家說明
The majority of Boscoli's figure studies have black chalk shading in the background but there are some, like the present drawing, only in red chalk, such as those at Edinburgh (K. Andrews, National Gallery of Scotland Catalogue of Italian Drawings, Cambridge, 1968, no. D 776, p. 22, fig. 173) and Windsor, A.E. Popham and J. Wilde, The Italian Drawings of the XV and XVI Centuries in the Collection of His Majesty the King at Windsor Castle, London, 1949, no. 141, fig. 40