Fernando Lopes-Graca's 24-volume Cancoes Regionais Portuguesas is an excellent subject for the study of the processes and implications of the adaptation of folk materials into the choral medium. This study considers the methods used to craft harmonizations of folk materials in light of Lopes-Graca's own writings about folksong harmonization, which state that we cannot forget to use the resources of harmony, counterpoint, and rhythm that we have in our modest technical arsenal in order to create a work of art. The identification of some of the methods utilized in selections from the 24 volumes will facilitate a discussion of their significance in relation to the writings of Lopes-Graca (and others) on the subject of folksong harmonization.