There are 2 titles associated with this firm.

@book{ wphp_26151
  author={Unknown,},
  year={1737},
  title={Reasons offered to the consideration of Parliament, for preventing the growth of Judaism; ... By the author of Reasons for a war against Spain},
  publisher={John Brett and Ruth Charlton},
  address={London},    }
@book{ wphp_26149
  author={Lediard,Thomas},
  year={1738},
  title={Some observations on the scheme, offered by Messrs. Cotton and Lediard, for opening the streets and passages to and from the intended bridge at Westminster. In a letter from one of the Commissioners for Building the said Bridge, to Mr. Lediard, and his answer. With the scheme and plan prefix'd: to which is added, a plan of the lower parts of the parishes of St. Margaret and St. John the Evangelist, from the Horse-Ferry to White-Hall; Wherein several farther Improvements are delineated, and a Proposal for Establishing a Perpetual Fund, to defray the Expences of Paving, Watching, and Lighting the said Bridge, and keeping it in Repair. By Thomas Lediard, Esq;},
  publisher={John Brett and Ruth Charlton},
  address={London},    }