Born at
Mitcham, then in
Surrey, Harmer was the daughter of Horace Alfred Harmer, an exporter of goods to Southern Africa, by his marriage to Harriett Frances Butler. She was educated at the
City of London School for Girls, from where she gained a scholarship to
Girton College, Cambridge and prepared for the Medieval and Modern Languages Tripos; she completed Section B of the tripos (the forerunner to the
Anglo-Saxon, Norse and Celtic tripos) in 1912 in the first class. From 1920 until 1957 Harmer was an academic of the
University of Manchester, becoming a Senior Lecturer in 1949 and a Reader in 1955. She was described by
Simon Keynes and
Alfred Smyth as "the formidable Anglo-Saxonist, Florence Harmer". After she retired in 1957, she lived at
Pinner, near a sister, continuing to attend meetings of the
British Academy, of which she was a Fellow, and events at Cambridge. ==Selected publications==