The reply of the Spanish Cabinet was received on the night of the 31st ultimo. It offers as the means to bring about peace in Cuba, to confide the preparation thereof to the Insular Parliament, inasmuch as the concurrence of that body would be necessary to reach a final result, it being, however, understood that the powers reserved by the Constitution to the central government are not lessened or diminished. As the Cuban Parliament does not meet until the 4th of May nest, the Spanish Government would not object, for its part, to accept at once a suspension of hostilities if asked for by the insurgents from the General-in-Chief, to whom it would pertain in such a case to determine the duration and conditions of the armistice. The propositions submitted by General Woodford and the reply of the Spanish Government were both in the form of brief memoranda, the texts of which are before me, and are substantially in the language above given. There remain the alternative forms of intervention to end the war, either as an impartial neutral by imposing a rational compromise between the contestants, or as the active ally of one party or the other. As to the first, it is not to be forgotten that during the last few months the relation of the United States has virtually been one of friendly intervention in many ways, each not of itself conclusive, but all tending to the exertion of a potential influence toward an ultimate pacific result just and honorable to all interests concerned. The spirit of all our acts hitherto has been an earnest, unselfish desire for peace and prosperity in Cuba, untarnished by differences between us and Spain and unstained by the blood of American citizens. The forcible intervention of the United States as a neutral, to stop the war, according to the large dictates of humanity and following many historical precedents where neighboring States have interfered to check the hopeless sacrifices of life by internecine conflicts beyond their borders, is justifiable on rational grounds. It involves, however, hostile constraint upon both the parties to the contest, as well to enforce a truce as to guide the eventual settlement. GROUNDS FOR INTERVENTION. The grounds for such intervention may be briefly summarized as follows: First. In the cause of humanity and to put an end to the barbarities, bloodshed, starvation and horrible miseries now existing there, and which the parties to the conflict are either unable to or unwilling to stop or mitigate. It is no answer to say this is all in another country, belonging to another nation, and is therefore none of our business. It is specially our duty, for it is right at our door. Second. We owe it to our citizens in Cuba to afford them that protection and indemnity for life and property which no government there can or will afford, and to that end to terminate the conditions that deprive them of legal protection.