She helped create St Anne's College as part of Oxford University in 1952, and she led a revival of interest in the work of Joachim of Fiore.
[2] After graduating with a first-class honours degree (having attended St Hugh's College) she stayed on to take a teaching diploma.
Reeves taught for two years in Greenwich at the Roan School for Girls as an assistant mistress[1] before becoming a research fellow at Westfield College in London in 1929.
At Westfield she made the unusual choice of studying Joachim of Fiore whose works she had found at Corpus Christi Library.
This medieval mystic was to be the subject of her doctorate in 1932 and of her book, The Influence of Prophecy in the Later Middle Ages: a Study in Joachimism (1969).
Whilst on this committee she helped with the Crowther Report that advised raising the school leaving age for children in Britain to 16.