Portrait of an Artist Drawing

Portrait of an Artist Drawing

Portrait of an Artist Drawing
Guercino (Giovanni Francesco Barbieri) (1591-1666)
Italy
About 1610-1660
Ink on laid paper
Width 18 cm x height 22.2 cm
Museum no. D.988-1900

This drawing is executed totally in line. Note how the chiaroscuro representing the depth of the eye sockets is drawn with short parallel diagonal strokes. The artist is drawing a landscape with a quill pen. Do you think the picture on the easel is a drawing or is it depicting a painting in line?