Intelligence from the Rio Grande fully confirms the defeat of Caravajal and the suppression of the insurrectionary movement in that quarter. On the 21st of February that chief led his forces, consisting of about 300 men to the attack on Camargo, when he was met by about 250 Mexican cavalry. The latter charged upon him three times, when the force under his command broke in confusion and fled across the river. His loss is stated at between thirty and sixty. This ends the revolutionary attempt in Northern Mexico.----Serious annoyance is experienced from the ravages of the Indians in that quarter. On the evening of the 21st a party of sixteen attacked a party of Americans and Mexicans near San Antonio, and killed several of the latter. About two hundred of them were encamped at Lake Espantoza, near the junction of the Leona and Nueces rivers. On the 16th, a party of dragoons attacked a body of Indians near Belleville, and dispersed them after killing four. SOUTH AMERICA. We have at length reliable news of decisive events on the Rio de la Plata. Rosas has been routed by Urquiza, and has fled to England. The control of the whole country, therefore, passes into new hands. From Buenos Ayres our intelligence is to the 3d of February. The passage of the Parana by the liberating army under Gen. Urquiza, commenced on the 22d of December, and was accomplished on the 8th of January. His force consisting of 28,000 men, with 50,000 horses, and 50 pieces of artillery, was brought together on the Diamanté, one of the strongest points upon the river, and he was at once joined by the citizens of the whole province of Santa Fé, and by 4000 troops of Rosas. The Governor of the Province fled toward Buenos Ayres. On the 10th of January the inhabitants of San Nicolao, the frontier town of the province of Buenos Ayres, pronounced against Rosas, and repelled an attack made upon them by a large cavalry force stationed near them. On the 15th Gen. Urquiza passed the frontier, with his whole army; and in a march of twelve days obtained possession of the entire northern part of the province, driving out all the cavalry of Rosas, which had been detached for its defense. On the 29th of January, his advanced guard reached the Rio Conchas, within six leagues of Buenos Ayres, having forced General Pacheco to retreat across that river with the small force remaining of those with whom he had gone to the defense of the province. Rosas had divided his force into three parts--one division of 4000 under Echaqué, another of 3500 under Mancilla, and the third of 5800 under Pacheco. This disposition of them rendered it easy for Urquiza to attack and defeat them separately. On the 27th of January Rosas set out for Santos Lugares, where his main force had been collected. A general engagement at once took place along the whole line of defense, which lasted for several hours, and resulted in the total defeat of the forces of Rosas, General Urquiza remaining master of the field.