Chris Hendrik Beekman, Composition, 1916, Pastel and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38177

Chris Hendrik Beekman, Composition, 1920, Watercolor on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38178

Chris Hendrik Beekman, Study in Black, Grey and White, (c. 1920), Gouache and charcoal on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38179