Frederick Hammersley's Biased #9, 1978Frederick Hammersley's Next is Now, 1966Frederick Hammersley's Title unknownFrederick Hammersley's Title unknownFrederick Hammersley's Title unknownFrederick Hammersley's Love me, love my dog, 1972Frederick Hammersley's Twain TwinFrederick Hammersley's Tact #2, 1973Frederick Hammersley's Title unknownFrederick Hammersley's #9, 1966Frederick Hammersley's Up with inFrederick Hammersley's One, #8, 1961Frederick Hammersley's Small Change, 1987Frederick Hammersley's 12, 1974-75