‘Little Girl with Slate’, ca. 1845, National Gallery of Art, Washington, D.C.
overall: 68.8 x 56 cm (27 1/16 x 22 1/16 in.)  framed: 77.4 x 64.7 x 5.3 cm (30 1/2 x 25 1/2 x 2 1/16 in.)