John Newton, John Cecil (1831). “The works of the Rev. John Newton ...: containing, an authentic narrative, etc., letters on religious subjects, cardiphonia, discourses intended for the pulpit, sermons preached in the parish church of Olney, a review of ecclesiastical history, Olney hymns, poems, Messiah, occasional sermons, and tracts, to which are prefixed, Memoirs of his life, &c. by the Rev. John Cecil”, p.319