The artist mentioned in the text is Antonio Campi, known for skillfully copying Parmigianino's inventions. The Lombard artist Antonio Campi is identified as the creator of the studies of heads in the text. The attribution to Campi was confirmed by Marco Tanzi and David Ekserdjian. The text also mentions a comparable drawing by Campi in the Louvre and an engraving in the British Museum that reproduces the present sheet. The original drawing supposedly by Parmigianino, which is identified with the present sheet, was in the collection of Benjamin West.A.E. Popham, Catalogue of the Drawings of Parmigianino, New Haven, 1971; Bartsch XII.148.13; Bartsch XV.66.1; Marco Tanzi and David Ekserdjian; Metz, Imitations of Ancient and Modern Drawings from the Restoration of the Arts in Italy to the Present Time, London, 1798....