Contains materials related to lectures given by Robert B. Jennings during his time at Duke University. Types of materials include manuscripts and cassette tapes related to lectures given for courses at Duke and other universities, labs, seminars, conferences, graduate classes, alumni weekends, fellowships, and graduations. Other materials include files, subscripts, micrographs, and references related to the contents of these lectures. Materials in this series range in date from 1956 to 1997, with the bulk being undated.