Canada's Quebec Tercentenary issue includes some stamps of martial interest (_Figs._ 309-311), the 5 cents shows the French Governor Champlain's house in Quebec, round which a wide ditch was dug and breastworks were thrown up and cannon mounted to protect the colonists from the savages. Generals Wolfe and Montcalm are portrayed on the 7 cents, the 10 cents shows the old city and fort of Quebec in 1700, and the other denominations show incidents in the exploration of Canada and portraits of King Edward and Queen Alexandra, and of King George and Queen Mary. [Illustration: 312 313] MEXICO. Mexican stamps from 1856 to the rise of Porforio Diaz demonstrate some of the political changes through which the country has passed, from Republic to Empire, and back to Republic. Revolution has brought about provisional stamps of a rare order, such as the Guadalajara, Chiapas, and Campeche stamps of 1867-1868, and the more recent issues of the "Constitutionalist" party for Sonora (_Figs._ 312-314) and Tamaulipas (_Fig._ 315). [Illustration: 314 315] _Figs._ 316, 317 represent ordinary Mexican stamps commandeered and overprinted by the rebels. [Illustration: 316 317] Martial portraits figure on the stamps of many of the South and Central States; to mention them all would require a goodly sized dictionary of American biography. In addition, specialists find much interest in tracing, by extra-territorial postmarks, the movements of troops in the various wars between Brazil and Paraguay, Chili and Peru, etc.; and many of the countries give us scenes recording outstanding incidents in their histories, especially on their issues commemorative of the centenary of their freedom from the Spanish yoke. Chili, for example, depicts the battles of Chacabuco, Roble, Maipo, the sea fight of April 27, 1818, between the _Lautaro_ and the _Esmeralda_, and another ending in the capture of the _Maria Isabella_ on October 28. In this series also is a portrait of the renowned Admiral Cochrane, the 10th Earl of Dundonald, who organised the Chilian Navy and played a great part in Chili's struggles for freedom from Spain. Ecuador's issue of 1896 marks the end of a period of civil strife and the triumph of the Liberal Party, a portion of the proceeds of the sale of the stamps being devoted to the destitute families of soldiers killed while serving in defence of the Liberal cause. [Illustration: 318 319] Colombia gives us a number of stamp designs of war-like interest, including warrior heroes, and a crude picture (_Fig._ 318) of the cruiser _Cartagena_. A particularly bitter commemoration of the centenary of the independence of Colombia in 1910 was the picturing on a registration fee stamp of the wholesale executions ordered by the Spanish victors at Carthagena on February 24, 1816. (_Fig._ 319). To this stamp objections were raised by the Spanish Minister at Bogota, and in deference to his protests it was withdrawn from circulation.