From South America the news is not very decisive. Uraguay, however, is completely emancipated from the control of Rosas. Oribe's army is disbanded, his officers have retired to Buenos Ayres, and he himself has retired to private life. Urquiza had left the Montevidean territory with part of his troops, on board Brazilian transports, for Entre Rios, from which he intended to march to Buenos Ayres. The Brazilian army remained in Uraguay, to support the actual government.——In Chili, according to latest advices, the revolution noticed some time since, was evidently extending itself more and more. By accounts received at Lima, December 1, Gen. Cruz, the leader of the insurgents, was at Chillan, with 3000 men, having had several engagements with the government troops under Ex-President Bulnes. Col. Carrera had been defeated by the government forces. At Valparaiso a riot occurred on the 28th of November. The mob attacked the barracks, procured arms, and fortified themselves in the Square. They were attacked by the troops under Governor-General Blanco, and dispersed after half an hour's engagement, in which 80 were killed. The agitation had subsided.——In Bolivia every thing was quiet.——In New Grenada a law has been passed, declaring the whole slave population to be free after January 1, 1852. General Herrara had returned from his visit to the southern provinces, where he had put down all the attempts at insurrection.