She intended to become a teacher, but her mother dissuaded her so she remained at home, entering into society, and writing in a quiet way for the local papers while using various pen names in order to avoid displeasing one of her brothers, who did not wish to have a "bluestocking" in the family.

Allyn served as the Washington correspondent for the Chicago Inter Ocean, as well as a writer for the St. Louis Globe-Democrat and the New York World.

The mother and children then moved from Jackson, Michigan, to Cleveland, where Eunice was graduated with honors from the high school.

[3] Allyn intended to become a teacher, but her mother dissuaded her and she remained at home, entering into society and writing quietly for the local papers.

[3] Before her marriage she gained valuable experience as Washington correspondent of the Chicago Inter Ocean, a position which she filled for a year, during which time she also wrote numerous articles for the St. Louis Globe-Democrat, the New York World, and before and since marriage, for various New York City, Boston, Indianapolis, Philadelphia, and Chicago journals.

[11] In Dubuque, she inaugurated many reforms and educational movements, doing the work, not for notoriety, but prompted by her inborn desire to do something towards lifting up humanity.

An effort began two years before her death to collect her literary works for preservation in the Iowa state historical archives.