There are 4 titles associated with this firm.

@book{ wphp_2818
  author={Unknown,},
  year={1754},
  title={Ingratitude: An epistle to ------ ------, Esq; Occasion'd by the late sad Catastrophe of a Clergyman at Norwich. By a Young Lady, Daughter of the said Clergyman. Illustrated with various notes.},
  publisher={Charles Sympson [Simpson]},
  address={London},    }
@book{ wphp_6534
  author={Cooper,Mary and Johnson,Mary},
  year={1754},
  title={Madam Johnson's present: or, the best instructions for young women, in useful and universal knowledge. With a summary of the late Marriage Act, and instructions how to marry pursuant thereto: digested under the following heads. I. An estimate of the expenses of a family in the middling station of life. II. The art and terms of carving, fish, fowl, and flesh. III. A bill of fare for every month in the year for dinner and supper, and also for extraordinary occasions. IV. The young woman's guide to knowledge. V. A new English spelling dictionary. VI. The compleat market-woman. VII. The cook's guide for dressing all sorts of flesh, fowl and fish. VIII. Pickling, pastry, and confectionary.},
  publisher={Mary Cooper \& Charles Sympson [Simpson]},
  address={London},    }
@book{ wphp_2819
  author={Unknown,[Woman]},
  year={1755},
  title={Ingratitude: an epistle to ------ ------, Esq; occasion'd by the late sad catastrophe of a clergyman at Norwich. By a young lady, daughter of the said clergyman. Illustrated with various notes.},
  publisher={Charles Sympson [Simpson]},
  address={London},    }
@book{ wphp_6519
  author={Johnson,Mary},
  year={1755},
  title={Madam Johnson's present; or, the best instructions for young women, in useful and universal knowledge. With a summary of the late Marriage Act, and Instructions how to marry purinant thereto. Digested under the following Heads. I. An Estimate of the Expences of a Family in the middling Station of Life. II. The Art and Terms of Carving, Fish, Fowl, and Flesh. III. A Bill of Fare for every Month in the Year for Dinner and Supper, and also for extraordinary Occasions. IV. The young Woman's Guide to Knowledge. V. A new English Spelling Dictionary. VI. The Compleat Market-Woman. Vii. The Cook's Guide for dressing all Sorts of Flesh Fowl and Fish. Viii. Pickling, Pastry, and Confectionary. With several useful tables, being the compleatest Book of the Kind ever published.},
  publisher={Mary Cooper \& Charles Sympson [Simpson]},
  address={London},    }