There are 2 titles associated with this firm.

@book{ wphp_15128
  author={Saunders,Mary},
  year={1835},
  title={Lincolnshire in 1835: with the Rivers Humber, Trent & Witham, Displayed in a Series of Views: Each View Accompanied by an Explanatory and Illustrative Description.},
  publisher={John Saunders, Jun.},
  address={Lincoln},    }
@book{ wphp_15129
  author={Saunders,Mary},
  year={1836},
  title={Lincolnshire in 1836: Displayed in a Series of Nearly One Hundred Engravings, on Steel and Wood; with Accompanying Descriptions, Statistical and Other Important Information, Maps, &c.},
  publisher={John Saunders, Jun.},
  address={Lincoln},    }