The order for the removal of guns from the Alleghany arsenal to southern forts is revoked by the War Department, under a decision of the Cabinet.
Fort Pulaski, at Savannah, Ga., is taken possession of by State troops, by order of the Governor.
A Book is opened in New York city, for the enrolment of volunteers to meet any demand which may be made by the Governor of the State for troops to aid in preserving the Union.--Times, Jan. 4.
The Florida State Convention assembled at Tallahassee.
Hon. H. Dickenson, Commissioner from Mississippi, addresses both Houses of the Delaware Legislature, inviting Delaware to join a Southern Confederacy. The House, having heard him, passed unanimously the following resolution, in which the Senate concurred: Resolved, That, having extended to Hon. H. Dickenson, Commissioner from Mississippi, the courtesy due him as a representative of a sovereign State of the Confederacy, as well as to the State he represents, we deem it proper and due to ourselves and the people of Delaware to express our unqualified disapproval of the remedy for the existing difficulties suggested by the resolutions of the Legislature of Mississippi.--Philadelphia Ledger.
The South Carolina Commissioners left Washington for Charleston, upon the President's declination to receive any further communication from them. They consider the abrupt termination of their business by the President an insult to themselves and their State, and treat it as a declaration of war.--(Doc. 12.)
In Washington, reports that armed bands were organizing to take possession of the capital before the votes for President and Vice-President are counted, meet with general, credence.  General Scott is actively engaged in the preparations to put down this mob.