This series includes assorted personal papers and photographs, especially photographs and papers of Lillian's family and friends, holiday cards, her college report cards, her research and correspondence regarding keeping her surname (Waugh) upon marriage to David Yelton, and her 2018 obituary. Family photographs range from 1932-1950s.

This series includes assorted files and a binder, all containing materials from Waugh's participation in protests and activism from the 1970s-2000s. The files consist of papers, badges, membership cards, and photographs from her involvement with the National Organization for Women [NOW] and its protests for the Equal Rights Amendment [ERA], conferences, and gender equality initiatives. They also feature programs, flyers, publications, and newspaper clippings related to other activist movements and protests. The binder contains photographs and newspaper clippings from these other movements, especially those from anti-war protests.

This series includes assorted papers and audiovisual media pertaining to Waugh's involvement as a founder and faculty member of the WVU Women's Studies (now Women and Gender Studies) Program. Most materials range from the 1970s-2000s. Materials include research that Waugh incorporated into her curriculum about the first Black students to graduate from WVU and women's suffrage movements. This material also contains departmental correspondence and academic consultations, the department's "Nexus" publications, an announcement of Waugh receiving the Buswell Award, grant reports, conference papers, and materials related to Waugh's retirement from WVU. The series also features an original telegram from 1920 announcing the passage of women's suffrage in West Virginia.

This series includes assorted papers and digital media containing research, program materials, publications, and conference applications regarding the WVU Women's Centenary Project. Most materials are from the 1980s-2000s. Two binders include research on the first WVU women students and graduates. This series also contains resesearch on women's inequality, labor, and education in West Virginia and Appalachia, including correspondence between Waugh and potential donors to the Centenary collection. They also feature the Centenary Project's publication, .