The danger of the dense ignorance in which their rulers kept the Filipinos showed itself in 1819, when a French ship from India having introduced Asiatic cholera into the Islands, the lowest classes of Manila ascribed it to the collections of insects and reptiles which a French naturalist, who was a passenger upon the ship, had brought ashore. However the story started, the collection and the dwelling of the naturalist fared badly, and afterwards the mob, excited by its success, made war upon all foreigners. At length the excitement subsided, but too much damage to foreign lives and property had been done to be ignored, and the matter had an ugly look, especially as no Spaniard had suffered by this outbreak. The Insular government roused itself to punish some of the minor misdoers and made many explanations and apologies, but the aggrieved nations insisted, and obtained as compensation a greater security for foreigners and the removal of many of the restraints upon commerce and travel. Thus the riot proved a substantial step in Philippine progress. Following closely the excitement over the massacre of the foreigners in Manila came the news that Spain had sold Florida to the United States. The circumstances of the sale were hardly creditable to the vendor, for it was under compulsion. Her lax government had permitted its territory to become the refuge of criminals and lawless savages who terrorized the border until in self-defense American soldiers under General Jackson had to do the work that Spain could not do. Then with order restored and the country held by American troops, an offer to purchase was made to Spain who found the liberal purchase money a very welcome addition to her bankrupt treasury. Immediately after this the Monroe Doctrine attracted widespread attention in the Philippines. Its story is part of Spanish history. A group of reactionary sovereigns of Europe, including King Ferdinand, had united to crush out progressive ideas in their kingdoms and to remove the dangerous examples of liberal states from their neighborhoods. One of the effects of this unholy alliance was to nullify all the reforms which Spain had introduced to secure English assistance in her time of need, and the people of England were greatly incensed. Great Britain had borne the brunt of the war against Napoleon because her liberties were jeopardized, but naturally her people could not be expected to undertake further warfare merely for the sake of people of another land, however they might sympathize with them.