Mother-midnight

subs. (common).—1.  A midwife; a FINGERSMITH (q.v.) and (2) a bawd.

  c. 1696.  B. E., A New Dictionary of the Canting Crew, s.v. MOTHER-MIDNIGHT, a midwife (often a Bawd).

  1785.  GROSE, A Classical Dictionary of the Vulgar Tongue, s.v.

  1811.  GROSE and CLARKE, Lexicon Balatronicum, s.v. MOTHER.