5 SEPTEMBER 1829, Page 1

Official accounts have reached Madrid of the sailing of the

expedi- tion against Mexico, on the 5th July. It consisted of 3,600 infantry, a company of artillery, without guns, and one hundred horse. Ac- cording to letters from South America, the expedition landed without opposition in the eastern extremity of Yucatan, which lies only about one hundred miles west from the Havannah. The Mexican forces, it was supposed, under Santa Anna, would soon give a good account of it. A treaty of peace between Lavalle and Rosas, the two hostile mili- tary chiefs at Buenos Ayres, was signed on the 34th June. The Ultras of the civil government were opposed to the arrangement, but without effect. Monte Video, it appears, is quietly settled under its new go- vernors, the Congress of the Banda Oriental, or Uruguay.