The christian's great interest. [electronic resource] : In two parts. I. The Trial of a Saving Interest in Christ. II. The Way how to attain it. By Mr William Guthrie, Minister of the Gospel at Finwick. To which is prefixed, a large account of his life, &c. by Way of Introduction, by the late Reverend Mr William Dunlop; and a Preface, by the late Reverend Mr William Dunlop; and a preface, by the late Reverend Mr Traill; with some Account of the Author from Mr Wodrow's History.