There are 2 titles associated with this firm.

@book{ wphp_26196
  author={Unknown,},
  year={1784},
  title={Orpheus and Eurydice.},
  publisher={Hannah Humphrey [51 New Bond Street]},
  address={London},    }
@book{ wphp_26199
  author={Unknown,},
  year={1786},
  title={A New Coat of Arms, granted to the H++ds of the U++++++++y of C+++++++e, since their late Edict against Dinners.},
  publisher={Hannah Humphrey [51 New Bond Street]},
  address={London},    }