The drawing´s style points more in the direction of Giovanni Battista Castello than Cambiaso. Typically, Castello´s line-work is more consistent in thickness, with fewer and less powerfully emphasized accents. The almost humorous expressions of the protagonists have the same playful glint to the eye as is so often encountered in Castello´s graphic work. Originally, the sheet must have extended further left to show the steed conveying Aurora´s vehicle.

Turner, Nicholas, From Michelangelo to Annibale Carracci. A century of Italian drawings from the Prado, Chicago, Art Services International, 2008, p.290