Montagu also published a volume of "Essays", mainly reprints, with "An Outline of a Course of Lectures upon the Conduct of the Understanding", London, 1824; "Thoughts on Laughter", London, 1830; "Thoughts of Divines and Philosophers", London, 1832, (a volume of selections); "Lectures delivered at the Mechanics' Institution upon the connexion between Knowledge and Happiness", London, 1832; "Essays and Selections", London, 1837; and "Thoughts on the Conduct of the Understanding", a fragment of an intended major work that he had on hand for thirty years, printed for private circulation, probably in 1847.