Cy Twombly, [Untitled], (1955), Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37220

Cy Twombly, Souvenir de L’Ile des Saintes, 1979, 8 works on paper, watercolour and gouache, Tate, London. https://dartabase.art/cite/tate/AR00181