As Florence Carroll, she obtained her AB and MA in French literature at the University of Chicago (1920)
Richard Tupper Atwater (December 29, 1892 – August 21, 1948)[1] was a Chicago writer and classics professor at the University of Chicago. He is probably best known as the co-author, with his wife Florence, of the book Mr. Popper's Penguins. He contributed to the literary and arts magazine The Chicagoan and wrote for a number of newspapers, including the Chicago Evening Post, the Chicago Daily News, the Chicago Tribune, and the Herald-Examiner. He also taught Classical Greek at the University of Chicago.
https://en.wikipedia.org/wiki/Richard_and_Florence_Atwater