Although traditionally attributed to Nicolò dell´Abate (1509/12-1571), Diane de Grazia has suggested the drawing could be by Perino del Vaga (note on the mount, dated 1989). There are here many ingredients from Perino´s style, but it is more likely that the drawing is the work of a follower, such as Luzio Romano. Since the sheet is laid down, the studies that partly show´ through from the verso are not properly decipherable.

Turner, Nicholas, From Michelangelo to Annibale Carracci. A century of Italian drawings from the Prado, Chicago, Art Services International, 2008, p.350