John Milton, Henry John Todd (1852). “The Poetical Works of John Milton: With Notes of Various Authors; and with Some Account of the Life and Writings of Milton, Derived Principally from Original Documents in Her Majesty's State-paper Office”, p.72
John Stuart Mill (2017). “JOHN STUART MILL - Ultimate Collection: Works on Philosophy, Politics & Economy (Including Memoirs & Essays): Autobiography, Utilitarianism, The Subjection of Women, On Liberty, Principles of Political Economy, A System of Logic, Ratiocinative and Inductive and More”, p.71, Madison & Adams