A full and authentic account of John Williamson, who was executed in Moorfields, on Monday the nineteenth of January, 1767, for the murder of his wife, By imprisoning and cruelly treating her, and denying her proper Sustenance. Containing, A particular and exact Narrative of Williamson's inhuman Treatment of his unhappy Wife, and of the Varieties of Misery which he forced her to endure; and also an Account of his Execution. Together with an original letter, written by Williamson after he was taken up; and also a vindication of him, written by himself