Senator Chestnut and Hammond of South Carolina and Toombs of Georgia have resigned their seats, in the U. S. Senate, to take effect on the 4th of March next. Judge McGrath, of the U. S. District Court, the District Attorney and the Custom house officers have also resigned. The Legislature have passed an act to call a Convention, to meet in December. Palmetto banners and blue cockades (the Symbols of treason) are multiplying and a Declaration of Independence has been prepared to be laid before the Convention. Treason although not so rampant as in South Carolina is rearing its horrid front. The Governor of Mississippi has called the Legislature, to meet on the 26th inst. – The Governor of Alabama has also called a Convention pursuant to an act passed, by the Legislature at its last session.