There are 2 titles associated with this person.

@book{ wphp_15261
  author={Montagu,Mary Wortley},
  year={1812},
  title={The Works of the Right Honorable Lady Mary Wortley Montagu. Including Her Correspondence, Poems, and Essays. Published, by Permission, from Her Genuine Papers. The Sixth Edition. In Two Volumes.},
  publisher={Longman, Hurst, Rees, Orme, and Brown \& },
  address={London},    }
@book{ wphp_25027
  author={Montagu,Mary Wortley},
  year={1817},
  title={The Works of the Right Honorable Lady Mary Wortley Montagu. Including Her Correspondence, Poems, and Essays. Published, by Permission, from Her Genuine Papers. The Sixth Edition. In Five Volumes.},
  publisher={Longman, Hurst, Rees, Orme, and Brown \& John Murray II [Albemarle] \& Robert Baldwin, Charles Cradock, and William Joy \& },
  address={London},    }