Preface.--Introduction.--The mentality of Hamlet.--Macbeth: a paranoiac.--The temporary insanity of Othello.--The mania of Lear.--The mania of Ophelia.--The madness of Lady Macbeth.--Goneril: a mental monstrosity.--Brutus's mental breakdown.--Timon's megalomania.--The mania of Constance.