4 May 1759
MH was born in Southwark
, London, into a family that in the end numbered at least six children.
MH's poem entitled "Invocation to the Nightingale" (opening "Wand'ring o'er the dewy meadow") appeared as by 'Miss Heys' in the final volume of James Harrison
's collected Lady's Poetical Magazine
MH wrote in the Monthly Magazine
about the need for a collection of inspiring biographies of women, which may be seen as the germ of her own collection of 1802.
MH published, with her name, her first, autobiographical, novel, Memoirs of Emma Courtney
, which presents its heroine unacceptably focussed on the pursuit of education, self-development, and love.