Nothing is known of MM's family, or where she came from or where she was born. Her birth probably took place after 1660, but she could have been alive before the Restoration period.
MM issued her most feminist text, the 16-page Good News to the Good Women
10 July 1701 The Post-Boy
carried an advertisement for MM's recently-published, forty-page Two Remarkable Females of Womankind
, which has been identified as her last tract.
Probably after February 1702
MM died; a collection of her works was advertised this month, which sounds as if she was still active, but nothing is known of her place or date of death.