Jan Cossiers (1600–1671)
Portrait of the Artist's Son Guilliellemus
Black and red chalk, a few touches of white chalk; some lines strengthened with pen and brown ink. Numbered and inscribed, probably in the artist's hand, at upper left, in brown ink, 21; at upper right, Guilliellemus Cossiers.
10 9/16 x 7 3/16 inches (268 x 183 mm)
The Pierpont Morgan Library
Purchased by Pierpont Morgan, 1910; I, 248