The collection contains materials related to Clark's life and career. The Project Files series features an alphabetical list of Broadway musicals, plays, revues, and dance recitals. Materials for each title are thematically arranged (lighting, contracts, props, etc.) to mirror the organization of Clark's original production notebooks. These can and often do include oversized lighting plots, scenic renderings, posters, and costume sketches. Many also contain setting and costume fabric swatches, photographic negatives, and delicate drawings and sketches in a variety of artistic mediums. Lighting and setting materials represent the most voluminous components of the notebooks. These principally consist of rolled plots and diazotype reproductions, blueprints, cue sheets, sketches, equipment specifications, and notes. Some of these lighting materials feature holograph drawings in Oliver Smith's hand or Clark's drawings of prominent Smith designs. Individual titles may also include any of the following: correspondence, scripts, clippings, contracts, posters, notes, black and white or color photographs, general production notes (schedules, expenses, etc.), and programs and invitations. This series also contains materials related to lighting projects Clark did for private American manufacturers, special interest groups, or the U.S. government. There are also individual and composite drawings of prominent performing arts venues throughout the United States, and an assortment of relatively small-scale lighting and design projects from various points in Clark's career. The Writings series contains published and unpublished writings, including typescript articles, plays, journals, scenarios, illustrated works, a novel, and other literary pieces that document Clark's professional and private interests in the theater. The Correspondence series contains chronologically arranged letters to and from family members, friends, and colleagues.The Organizational Materials series consists of correspondence, meeting minutes, promotional materials, and other content related to Clark's associations with professional technical theater organizations, most notably the United States Institute for Theatre Technology, and United Scenic Artists. The Photographs series contains a chronological run of portraits, as well as images of the Clark family. The Drawings series contains an eclectic mix of Clark's non-theatrical drawings, including sketches and paintings created mainly for graduate school assignments. In addition, there are childhood drawings, sketchbooks of Woods Hole scenery, and a humorous series of original Christmas cards. Scrapbooks in the collection consist of several bound volumes of photographs, clippings, programs, and memorabilia related to events at Smith College. A small series of Biographical Materials contains résumés and clippings about Clark and her professional activities, as well as documents related to family history.