There are 2 titles associated with this firm.

@book{ wphp_12671
  author={Wilkinson,Sarah Scudgell},
  year={1815},
  title={Love and Hymen; or the Gentleman's and Ladies' Polite and Original Valentine Writer.  For the Present Year. By Sarah Wilkinson.},
  publisher={William Perks \& },
  address={London},    }
@book{ wphp_12657
  author={Wilkinson,Sarah Scudgell},
  year={1820},
  title={The Turtle Dove; or Cupid's Artillery Levelled against Human Hearts, being a New and Original Valentine Writer. For the present year. By Sarah Wilkinson.},
  publisher={William Perks \& },
  address={London},    }