File:Sketch of Castor and Pollux.jpg

Nicolas Poussin, Castor and Pollux, ca. I628. Pen and brown wash on paper, 9%/8 x 6/4 in. (24.6 x 17.i cm). Drawing after the so-called San Ildefonso Group, now in the Prado. The stamped mark in the lower right corner identifies it as in the collection of the Musée Condé, Chantilly. From