1820. Revolution in Spain: policy of non-intervention 210 July, Aug. Revolutions in the Two Sicilies and Portugal 211 20 Oct. Congress of Troppau 211 Jan., 1821. Congress of Laibach 212 Mar., April. Revolution in Piedmont: Austrian intervention 213 Insurrections in the Morea and Central Greece 214 Aug. "Sanitary cordon" 215 Ultra-royalist parties in France and Spain 215 Loss of Spanish colonies in America 215 1822. Conference at Vienna 216 20 Oct. Congress of Verona 217 Offer of mediation declined 218 7 April, 1823. War between France and Spain 220 12 Oct., 1822. Independence of Brazil 221 July, 1825. Conference at London 222 2 Dec., 1823. The Monroe doctrine 223 1824-25. Conference at St. Petersburg 224 1 Dec., 1825. Death of the Tsar Alexander I. 225 CHAPTER XI. TORY DISSENSION AND CATHOLIC RELIEF. April, 1827. Formation of Canning's ministry 227 Additions to the ministry 228 8 Aug. Death of Canning 228 Sept. Goderich's cabinet 229 Dissensions: resignation of Goderich 230 9 Jan., 1828. Wellington accepts office 230 The Eastern question 232 20 Oct., 1827. Navarino 233 1828. Repeal of the test and corporation acts 235 May, June. Changes in the ministry 236 June, July. The Clare election 237 1821. Measures for catholic relief 239 1825. Further measures 241 George IV.'s opposition to catholic relief 244 1829. Wellington and Peel adopt catholic relief 245 Mar., April. Debates on the bill 246 13 April. The royal assent 249 21 Mar. Duel between Wellington and Winchilsea 250 Exclusion of O'Connell from Parliament 251 CHAPTER XII.