Burke said that there were Three Estates in Parliament; but, in the Reporters' Gallery yonder, there sat a Fourth Estate, more important far than they all.
Source: Heroes and Hero-Worship, v. `The Hero as Man of Letters'
-- Thomas Carlyle, (Dec 4 1795-1881), Scottish essayist, historian; He was considered one of the era's great sages and man of letters; wrote The French Revolution, 1837.