The papers of the Fortnightly Ignorance Club consist of two manuscript volumes containing minutes of the group's meetings, correspondence, newspaper clippings, and club budgets. The correspondence, between recording secretary Jenny Marsh Parker and notable women reformers (including Marie E. Zakrzewska and Susan B. Anthony), is interleaved in the volumes and indexed. The two volumes cover the periods 1881 to 1883 (volume 1) and 1886 to 1891 (volume 3) with a gap during the intervening years.

The collection is in four sections. The first (box 1) contains miscellaneous letters written by Susan B. Anthony (ten original letters and approximately seventy typescripts made by Alma Lutz while doing research for her book Susan B. Anthony: Rebel, Crusader, Humanitarian, Boston, 1959). The letters date from 1870 to 1905. Here also are typescripts of letters from Miss Anthony to her housekeeper, friend and occasional secretary Anne E. Dann Mason (31 letters) and a copy of Mrs. Mason's reminiscences of Susan B. Anthony.