There are 2 titles associated with this person.

@book{ wphp_9256
  author={Logan,Eliza},
  year={1823},
  title={St Johnstoun; or, John, Earl of Gowrie. In Three Volumes.},
  publisher={Robert Baldwin, Charles Cradock, and William Joy \& Maclachlan and Stewart [1819-34] \& },
  address={Edinburgh},    }
@book{ wphp_9411
  author={Logan,Eliza},
  year={1829},
  title={Restalrig; or, The Forfeiture. By the author of St Johnstoun, or John Earl of Gowrie. In two volumes.},
  publisher={W. Simpkin and R. Marshall \& Maclachlan and Stewart [1819-34] \& },
  address={Edinburgh},    }