Charles Monnet, Jupiter couvre la Terre de Nuages pour jouir d'Io, published 1767/1771, pen and black ink and brush and brown ink with brown wash over graphite, National Gallery of Art, Washington. https://dartabase.art/cite/nga/2027

Charles Monnet, Perseus Turning Phinneas to Stone with the Head of Medusa, 1767, pen and black ink with brown and gray wash over traces of graphite, with double border line by the artist in pen and gray ink, on laid paper, laid down, National Gallery of Art, Washington. https://dartabase.art/cite/nga/2111