Blake showed this painting in his 1809 exhibition. Admiral Lord Nelson is directing Leviathan, a great biblical sea monster which Blake used as a symbol of war.
This work is cracked and damaged because Blake used a thin canvas and chalk-based ground. The ground layer has darkened due to the conservation treatment of ‘glue’ lining; this is only suitable for oil paintings. Layers of glue in some of Blake’s paints have also darkened. The orange tonality comes from remnants of a discoloured varnish. The contraction of the glue-rich layers and the movement of the thin canvas has created stress, causing cracking.