The contest between Spain and the colonies, according to the most authentic information, is maintained by the latter with improved success. The unfortunate divisions which were known to exist some time since at Buenos Ayres it is understood still prevail. In no part of South America has Spain made any impression on the colonies, while in many parts, and particularly in Venezuela and New Grenada, the colonies have gained strength and acquired reputation, both for the management of the war in which they have been successful and for the order of the internal administration. The late change in the Government of Spain, by the reestablishment of the constitution of 1812, is an event which promises to be favorable to the revolution. Under the authority of the Cortes the Congress of Angostura was invited to open a negotiation for the settlement of differences between the parties, to which it was replied that they would willingly open the negotiation provided the acknowledgment of their independence was made its basis, but not otherwise. Of further proceedings between them we are uninformed. No facts are known to this Government to warrant the belief that any of the powers of Europe will take part in the contest, whence it may be inferred, considering all circumstances which must have weight in producing the result, that an adjustment will finally take place on the basis proposed by the colonies. To promote that result by friendly counsels with other powers, including Spain herself, has been the uniform policy of this Government.