Wilson began this drawing by applying a chalky, ochre-coloured wash to the paper. He then worked over the surface with black chalk, using quite light pressure. The chalk lines have picked up the surface texture of the laid paper. Diagonal hatchings of heavily applied chalk define the shadows in the arches. The ochre wash on the paper contrasts with the dark lines of the structure, suggesting light coming through the arches. Subtle white chalk highlights have been added to the central right arches.
Gallery label, August 2004