[5] Upon returning to the United States in 1900, she found work with the established New York architect John R. Thomas, where she helped design or prepare plans for the Hall of Records.

[4] Kellogg also helped design the Woman's Memorial Hospital in Brooklyn, founded by female physicians in 1881, as well as hundreds of other buildings and cottages.

[6] Unafraid to think big or to personally oversee her projects, Kellogg once happily conducted an interview while swaying on a beam nine stories above New York on one of her buildings under construction.

She told the terrified reporter, "I don't think a woman architect ought to be satisfied with small pieces, but launch out into business buildings.

Unable to attend the Ecole des Beaux Arts because of her sex, she advocated admission of women to the prestigious academy during her residence in Paris.

In part due to her efforts, the French government passed a bill to allow women to study there, although it came too late for Kellogg herself to attend.

[10] During an address by the English suffragist Mrs. Pankhurst at Carnegie Hall in 1909, Kellogg was the only architect among dozens of professional women seated on the stage.

[4] Kellogg became ill in Atlanta, Georgia in the spring of 1918 while supervising construction of YWCA hostess houses at Camp Gordon, and died in July 1918 at her home in Brooklyn, New York, aged 47.