[1] Her successor, William Corless Mills, revised and expanded Moorehead and Allen's map and published it as the landmark Archaeological Atlas of Ohio,[3] the first comprehensive state archaeological survey produced in the United States.

[1] In 1901, Allen left Ohio State to study under historian Albert Bushnell Hart of Harvard University, but she did not complete her PhD.

[5] Whilst married she wrote the History of Forest Hills from the Days of Indians, which was published in 1924.

[6] After her husband's death in 1925, Allen became the assistant to the headmaster and librarian at Kew-Forest School in Forest Hills, New York,[1][7] and was appointed the Dean of Girls in 1947.

She also served as the editor of The Forest Hills Gardens Bulletin, and was known for her living history performances, portraying American women such as Dolley Madison and Harriet Beecher Stowe.