There are 2 titles associated with this person.

@book{ wphp_24930
  author={Churchill,John},
  year={1705},
  title={An account of the forcing the French lines, by His Grace the Duke of Marlborough: Whitehall July 14th 1705.},
  publisher={},
  address={Edinburgh},    }
@book{ wphp_24946
  author={Churchill,John},
  year={1706},
  title={His Grace the Duke of Marlborough's Letter to the Rt. Hon. Mr. Secretary Harley, together with other Letters which passed between His Grace and the Deputies of the States-General and the Three States of Barbant, the Magistrates of Brussels, &c. Published by Authority.},
  publisher={Mary Jones [Savoy]},
  address={London},    }