There are 2 titles associated with this firm.

@book{ wphp_25505
  author={Blackwell,Henry},
  year={1730},
  title={The gentleman's tutor for the small sword: Or, The compleat English fencing master. Containing the truest and plainest rules for learning that noble art; shewing how necessary it is for all gentlemen to understand the same. In 13 various lessons between master and scholar. Adorn'd with several curious postures.},
  publisher={J. and T. W. \& },
  address={London},    }
@book{ wphp_25357
  author={Blackwell,Henry},
  year={1730?},
  title={The gentleman's tutor for the small sword: or, the compleat English fencing master. Containing the truest and plainest rules for learning that noble art; shewing how Necessary it is for all Genteleman to understand the Same. In 13 various lessons between master and scholar. Adorn'd with several curious postures.},
  publisher={J. and T. W. \& },
  address={London},    }