Filtering the world around him into his own
pictorial space throughout an incredibly prolific career, Green's works are useful markers in illustrating the rapid shifts of the world around him as it entered a new and chaotic century.
Current studies include the structure of
pictorial space throughout the history of art, particularly the dramatic emergence of geometric perspective in the 15th century.
Yet, for all this variety, certain features tended to recur
throughout Hammersley's career: areas of bright, unbroken colour, a complex and ambiguous attitude to
pictorial space and, above all, a playfulness indicated by the suggestive titles - Persuasion (1960), Tact (1973), Cool de Sac (1977) and Tango (1980).