September - Michael Field

Michael Field was a pseudonym used for the poetry and verse drama of Katharine Harris Bradley (27 October 1846 – 26 September 1914) and her niece and ward Edith Emma Cooper (12 January 1862 – 13 December 1913). As Field they wrote around 40 works together, and a long journal Works and Days. Their intention was to keep the pen-name secret, but it became public knowledge, not long after they had confided in their friend Robert Browning. - Summary by Wikipedia