author
1860–1932
A Salvation Army writer whose books brought Christian history and faith to a wide popular audience, she is best remembered for lively, accessible biographies and devotional works.

by Mildred Duff, Noel Hope

by Mildred Duff
Mildred Duff (1860–1932) wrote religious and biographical books associated with the Salvation Army. Confirmed surviving works include Catherine Booth: A Sketch and, with Noel Hope, The Bible in Its Making: The Most Wonderful Book in the World.
Her writing seems to have been aimed at general readers rather than specialists, with a simple, direct style suited to readers interested in faith, church history, and inspiring lives. Library and public-domain records also connect her with Salvation Army publishing.
Some details of her life are harder to verify from the sources I found, so it is safest to remember her chiefly through the books she left behind and her place in early 20th-century religious publishing.