An enquiry into the causes of infidelity [electronic resource] : In two Discourses upon John Vii. 17. Deliver'd at St. Mary's in Cambridge, Before the University: The former being an Act-Sermon, on May 18. The other on the Commencement-Sunday, June 29, 1729. (the Publication of which, particularly the latter, was desired by several who heard them.) To which is prefixed, A Discourse concerning the true Interpretation of the said Text. By Thomas Sharp, D. D. Archdeacon of Northumberland, and late Fellow of Trinity College, Cambridge.