Robert Murray M'Cheyne, Andrew Alexander Bonar (1846). “Memoir and Remains of the Rev. Robert Murray M'Cheyne: Minister of St. Peter's Church, Dundee”, p.240
John Bunyan (1811). “Choice Works: Containing Grace Abounding to the Chief of Sinners: Heart's Ease in Heart Trouble: The World to Come, Or Visions of Heaven and Hell: The Barren Fig-tree: and The River of Water of Life”, p.75