There are 2 titles associated with this person.

@book{ wphp_425
  author={Lancelot,Claude},
  year={1813},
  title={Narrative of a Tour Taken in the Year 1667, to La Grande Chartreuse and Alet, by Dom Claude Lancelot, Author of the Port Royal Grammars; Including Some Account of Dom Armand Jean le Bouthillier de Rancé, Reverend Father Abbé, and Reformer of the Monastery of Notre Dame de la Trappe: with Notes and an Appendix, Containing Some Particulars Respecting M. Du Verger de Hauranne, Abbé de St. Cyran; Cornelius Jansenius, Bishop of Ypres; and also a Brief Sketch of the Celebrated Institution of Port Royal.},
  publisher={John and Arthur Arch [Cornhill] \& },
  address={London},    }
@book{ wphp_15067
  author={Lancelot,Claude},
  year={1816},
  title={A Tour to Alet and La Grande Chartreuse, by Dom Claude Lancelot, author of the Port Royal Grammars; with some account of the Monastery and Abbot Reformer of La Trappe; also biographical sketches of M. Du Verger de Hauranne, Abbedest.Cyran, Cornelius Jansenius, Bishop of Ypres; and a brief view of the celebrated institution of Port Royal. By Mary Anne Schimmelpenninck, author of Theory of the Classification of Beauty and Deformity. A Narrative of the Demolition of Port Royal Des Champs. &c.  Second Edition, Considerably Enlarged. In Two Volumes.},
  publisher={John and Arthur Arch [Cornhill] \& },
  address={London},    }