Whole Duty of Man
Tenison, Bishop of Lincoln, says the author was Dr. Chaplin, of University College, Oxford. (Evelyn: Diary.)
Thomas Hearne ascribes the authorship to Archbishop Sancroft.
Some think Dr. Hawkins, who wrote the introduction, was the author. The following names have also been suggested:- Lady Packington (assisted by Dr. Fell), Archbishop Sterne, Archbishop Woodhead, William Fulham, Archbishop Frewen (President of Magdalen College, Oxford), and others.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894