The collection comprises material collected by Dorothy representing her line of the Amos Avery branch of the Groton Avery family. Material related to Oliver Perry Avery and his children figure prominently in the material that Clark gathered over the years.
Records of the Edward Avery Association document activities, mostly during the active period (1896-1916) of the association, and include a record book, constitution, bylaws, and meeting minutes, annual meeting invitations and programs, a speech, poems/songs, newspaper clippings with notice of meetings.