The latest report about the Spanish crown is, that it will now be offered to Prince Alfonso, the second son of the King of Portugal, who is but five years of age. The Spaniards have hunted through all the nations of Europe for a King. They tried to get a Portuguese in the person of Dom-Luis, who is an old ex-monarch; they tried to get an Italian, in the person of Victor Emanuel's young son, the Duke of Genoa; they tried to get a Spaniard, in the person of Espartero, who is an octogenarian. Some of them desired a French Bourbon, Montpensier; some of them a Spanish Bourbon, the Prince of Asturias; some of them an English prince, one of the sons of Queen Victoria. They have just tried to get the German Prince Leopold; but they have thought it better to give him up than take a war along with him. It is a long time since we first suggested to them to try an American ruler. We can offer them a large number of able and experienced sovereigns to pick from--men skilled in statesmanship, versed in the science of government, and adepts in all the arts of administration--men who could wear the crown with dignity and rule the kingdom at a reasonable expense. There is not the least danger of Napoleon threatening them if they take an American sovereign; in fact, we have no doubt he would be pleased to support such a candidature. We are unwilling to mention names--though we have a man in our eye whom we wish they had in theirs.--New York Tribune. It would be but an ostentation of modesty to permit such a pointed reference to myself to pass unnoticed. This is the second time that 'The Tribune' (no doubt sincerely looking to the best interests of Spain and the world at large) has done me the great and unusual honour to propose me as a fit person to fill the Spanish throne. Why 'The Tribune' should single me out in this way from the midst of a dozen Americans of higher political prominence, is a problem which I cannot solve. Beyond a somewhat intimate knowledge of Spanish history and a profound veneration for its great names and illustrious deeds, I feel that I possess no merit that should peculiarly recommend me to this royal distinction. I cannot deny that Spanish history has always been mother's milk to me. I am proud of every Spanish achievement, from Hernando Cortes's victory at Thermopylae down to Vasco Nunez de Balboa's discovery of the Atlantic ocean; and of every splendid Spanish name, from Don Quixote and the Duke of Wellington down to Don Caesar de Bazan. However, these little graces of erudition are of small consequence, being more showy than serviceable.