A discourse about a scrupulous conscience: preached at the Parish-Church of St. Mary Aldermanbury, London : By Benjamin Calamy, D.D. one of His Majesty's Chaplains in ordinary. Being the sermon, by which scrupulous consciences were invited to examine the merits of the cause, &c. And occasion'd Mr. Thomas Delaune to write a book, entitul'd, a plea for the nonconformists; in answer hereto.