Jean-François Millet, The Diggers (Les becheurs), 1855, etching, National Gallery of Art, Washington. https://dartabase.art/cite/nga/9192

Jean-François Millet, The Newborn, 1814, charcoal on blue laid paper, National Gallery of Art, Washington. https://dartabase.art/cite/nga/9190

Jean-François Millet, The Sower, 1814, chalk on blue laid paper, National Gallery of Art, Washington. https://dartabase.art/cite/nga/9189