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

Gottfried Bernhard Goetz, Allegory of Europe, from the Four Continents, 1728–74, Graphite, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334877

Gottfried Bernhard Goetz, Allegory of Africa, 1728–74, Black chalk (and graphite?), The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334878