 Kemp and Cotte identified where two sheets were missing from this volume from which they believe the drawing was cut.Kemp and Cotte say that, although "the dimensions and precise locations of the holes in the portrait cannot be obtained with precision", the three holes on the left-hand side of the drawing can be aligned with three of the five stitch holes in the sheets in the book.According to Kemp and Cotte, the association with the "Sforziada" suggests that the drawing is a portrait of Bianca Sforza, who was the daughter of Ludovico Sforza and his mistress Bernardina de Corradis.