The works of the Reverend George Whitefield, M.A., late chaplain of Pembroke-college, Oxford, and chaplain to the Rt. Hon. the countess of Huntingdon : containing all his sermons and tracts which have been already published : with a select collection of letters, written to his most intimate friends, and persons of distinction in England, Scotland, Ireland, and America, from the year 1734, to 1770, including the whole period of his ministry : also some other pieces on important subjects never before printed / prepared by himself for the press ; to which is prefixed, an account of his life, compiled from his original papers and letters.