Symptoms of deep thinking : sinking from thought to thought, a vast profund.

Caricature of Sir Charles Bunbury as a stout, elderly man, walking in profile to the left, staring with fierce concentration, one hand on his heart, the other deep in his breeches pocket. He steps on a loose flag-stone from which a fountain of mud splashes over his stockings. The background is a stone wall; down it runs a pipe from which a muddy stream gushes on to the pavement. A sign-post points 'To St. Sthephens Chaple' [sic].