Giovanni Battista Piazzetta, A Flying Angel (recto); Studies of Hands Playing Instruments (verso), 1723–27, black chalk heightened with traces of white chalk, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/117767

Giovanni Battista Piazzetta, A Young Woman Buying a Pink from a Young Man, c. 1740, black crayon (wetted and rubbed) heightened with white chalk on faded blue paper, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/117766