Adolph von Menzel, Head of a Bearded Man, 1884, Graphite, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334928

Adolph von Menzel, Doctor and Patient, 1899, Graphite, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334927

Arent van Bolten, A Fantastic Creature, late 16th–early 17th century, Pen and brown ink, brush and brown wash, over black chalk; framing lines in pen and brown ink, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334690

Adolph von Menzel, Woman with a Crushed Velvet Hat, 1894, Graphite, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334929

Pieter de Jode I, Neptune in his Chariot, late 16th–mid 17th century, Pen and brown ink, brown wash, over traces of black chalk, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334883