There are 2 titles associated with this person.

@book{ wphp_26012
  author={Blackerby,Samuel},
  year={1717},
  title={Cases in law: wherein justices of peace have a jurisdiction, as well by their commission, as by Act of Parliament, which have received a determination by the judges in Westminster Hall, their [unclear] and in Sergeants Inn, from Edward the Third's time to this day: as they are reported in the year-books, and all the other reports down to this time. With the addition of some modern cases, not yet reported in any Book. Being the second part of The justice of peace's companion. By Samuel Blackerby, of Gray's Inn, Esq.},
  publisher={John Walthoe I \& John Walthoe II},
  address={London},    }
@book{ wphp_26082
  author={Blackerby,Samuel},
  year={1719},
  title={The justice of peace his companion: or, a summary of all the Acts of Parliament; whereby one, two, or more justices of the peace, are authorized to act, not only in, but out of the Sessions of the Peace. With an exact alphabetical table. By Samuel Blackerby, of Grays-Inn, Esq; The fourth edition, continued to the end of the last session of Parliament, April 18. 1719.},
  publisher={John Walthoe I},
  address={London},    }