The greatest authority is the Autobiography of Metternich; but Alison's
History, though dull and heavy, and marked by Tory prejudices, is
reliable. Fyffe may be read with profit in his recent history of Modern
Europe; also Müller's Political History of Recent Times. The Annual
Register is often quoted by Alison. Schlosser's History of Europe in the
eighteenth and nineteenth centuries is a good authority.