This sub-series contains material related to Harkness's work with the National Silver Haired Congress (NSHC) and includes bylaws, conference correspondence, session opening and final resolutions, newsletters, conference memorabilia, rosters, conference agendas and speaker biographies, committee directories, orientation guides, staff information, and reference material from state silver haired legislations and aging agencies. Also includes material from The Aging Forum related to the NSHC and the National Committee to Preserve Social Security and Medicare.

Material was arranged in rough alphabetical order by Spencer processing staff.