This collection is composed chiefly of professional correspondence with 117 individuals, and includes biographical information about scientists in the fields of epidemiology, public health, communicable diseases, and health science policy.

These journals record his medical and epidemiological research (especially that on Kuru), pediatric studies, human and population genetics work, as he traveled throughout the world. The countries and regions included are Africa, Australia, Colombia, Guam, Indonesia, Libya, Melanesia, New Guinea, New Hebrides, Pacific Islands, Paraguay, Soviet Union, and the Western Caroline Islands.