There are 2 titles associated with this firm.

@book{ wphp_9619
  author={Edgeworth,Maria},
  year={1805},
  title={Letters for Literary Ladies: to which is added, An Essay on the Noble Science of Self-Justification. The Third Edition. By Miss Edgeworth, author  of Practical Education, Parents' Assistant, &c. &c.},
  publisher={Joseph Johnson \& },
  address={Harlow},    }
@book{ wphp_8517
  author={Edgeworth,Maria},
  year={1806},
  title={Moral Tales for Young People: By Miss Edgeworth, author of Practical Education, &c. In Three Volumes. Second Edition.},
  publisher={Joseph Johnson \& },
  address={London},    }