There are 2 titles associated with this firm.

@book{ wphp_26191
  author={},
  year={1780},
  title={L—d Am—t on Duty. If I had power, I'd kill 20 in an hour.},
  publisher={Hannah Humphrey [18 New Bond Street]},
  address={London},    }
@book{ wphp_26192
  author={Unknown,},
  year={1782},
  title={The Soliloquy.},
  publisher={Hannah Humphrey [18 New Bond Street]},
  address={London},    }