The Pioneers Collection consists mainly of the organization's minutes from its origin in 1879 to the present (1999), and yearbooks from 1949 to the present. There are a few notable gaps in the minutes, namely from 1930 to 1933, 1940 to 1949, and 1970 to 1977. The run of yearbooks, which outline the course of study for the year and often contain lists of members, is more complete, although there are a few missing. The collection also contains some printed constitutions and by-laws, a number of papers presented by member Betty (Mrs. Edwin) Grossman, reading lists and study outlines, and a folder of invitations and programs from 1879 to the present.