This study presents a theory of melodic creation, transmission, memory, and recall within the Anglo- and Celtic-American culture of lower Appalachia, from the time of the earliest European settlers until the present. This theory and its attendant hypotheses draw upon earlier published ideas, current theories of memory and recall, and the results of applying a computer-supported analytical system developed by the author. Sources include previous studies of folksong melody, song collections, and earlier investigations of the psychology of memory. Also important are portions of an anonymous treatise on traditional Celtic musical scales and an authoritative, modern interpretation of this document. A final body of sources is a small group of sound-recordings.