Database trial ENDS October 15. If your suffragist was active in or near St. Louis, you may find information on her here.
Finding Little-Reseached Women From 100 Years Ago
Be aware of turn-of-the-century naming conventions for women, especially married women, who could be known by their husbands' first and last names.
Sometimes the woman's organization(s) may be a good point of contact.
Consider getting a borrower card at Columbia Public Library by applying online or bringing a photo ID (MU student ID qualifies) to the library in person. This gives you access to ancestry.com from the library building, and to Newsbank online.
Many databases use common search conventions, like setting off phrases in quotation marks, or using * (asterisk) after the first few letters of a word to search for all words that start with that string of letters, or using OR to separate synonyms.