Correspondence, 1953-1954, relating to Hackett's appointment to the World Health Organisation Unit ID: 10
Correspondence, 1967-1970, relating to a visit to Australia, New Zealand and the United States of America in 1967-1968. In Australia, Hackett inspected aboriginal skulls and bones in several museums and universities. Unit ID: 11
Correspondence, 1971-1972, mainly with Professor E. Uehlinger relating to a study of the diagnostic criteria for diseases in dry bones Unit ID: 12
Correspondence, newscuttings and notes, 1975-1995, relating to the establishment of the Florey Memorial Stone in Westminster Abbey in 1981 and the annual Florey commemorations. Hackett was one of the instigators of this project Unit ID: 7