Book excerpt: Joseph Maingot describes the parameters of the principal immunity enjoyed by Members of Parliament, that of freedom of speech, which is restricted to the context of a parliamentary proceeding and not beyond. He points out protections afforded members other than parliamentary privilege and the view of both the courts and the legislatures concerning parliamentary debates and proceedings as evidence in court. He also sets out in detail what the House of Commons considers to be and not to be a matter of privilege, as well as the corporate powers of the Houses of Parliament.