Series III naturally breaks down into two sub-series: writings by Powell and writings about Powell. Powell's writings comprise published and unpublished articles and letters to the editor, as well as an interesting and informative book proposal for an autobiography, a commencement address, program notes, analyses, lecture notes, and miscellaneous jottings. Writings about Powell include numerous articles from newspapers and magazines, as well as a publisher's catalog, a publicity brochure, and the catalog of an exhibit of Powell's paintings.