After John Constable RA The Cornfield oil on canvas 91.5 x 71cm Constable's original composition is in the National Gallery, London. Condition report: Oil on canvas which has been lined. The canvas is in plane and the tension is stiff. The paint layers are in a stable condition overall. Old damages have been retouched, the retouchings are fairly well matched to the original. The varnish is clear, even and semi-matte. There are a few scuffs present in the varnish and a layer of surface dust present.