The certainty, time, and end, of the birth of our Lord and Saviour Jesus Christ; with the accomplishment of several of the prophecys [sic], relating thereto. : A sermon, at the lecture, in Marblehead, December 25. 1729. : To which is added, an appendix, attempting more clearly to state, the true year of our Lord's nativity. / By John Barnard, V.D.M. of Marblehead.