Contains correspondence with Lyman's colleagues and former students at Duke University, Johns Hopkins University, and other institutions. Also contains Lyman's correspondence related to various hospitals, schools, medical societies, associations, and conferences, laboratories, and his work with conscientious objectors during World War II. Specific Duke Departments and associated entities discussed in this correspondence include the Department of Psychology, the Duke Parapsychology Lab, and Highland Hospital. Materials date from 1940 to 1957.