 Another, called "Spirit Python" was the 30c value in a set issued on 14 April 1988 to celebrate the 30th Anniversary of the opening of the National Gallery.Munyaradzi derived his subject matter from the natural world, combining it with Christian imagery and depicting it in an unusual, deeply personal fashion.Celia Winter-Irving, in her book on Stone Sculpture (see Further Reading) wrote “Like Paul Klee, Henry takes a line for a walk but he reins it in after the first steps”.