DEAR SIR,--Your letter of August the 15th was received in due time, and with the welcome of everything which comes from you. With its opinions on the difficulties of revolutions from despotism to freedom, I very much concur. The generation which commences a revolution rarely completes it. Habituated from their infancy to passive submission of body and mind to their kings and priests, they are not qualified when called on to think and provide for themselves; and their inexperience, their ignorance and bigotry make them instruments often, in the hands of the Bonapartes and Iturbides, to defeat their own rights and purposes. This is the present situation of Europe and Spanish America. But it is not desperate. The light which has been shed on mankind by the art of printing, has eminently changed the condition of the world. As yet, that light has dawned on the middling classes only of the men in Europe. The kings and the rabble, of equal ignorance, have not yet received its rays; but it continues to spread, and while printing is preserved, it can no more recede than the sun return on his course. A first attempt to recover the right of self-government may fail, so may a second, a third, &c. But as a younger and more instructed race comes on, the sentiment becomes more and more intuitive, and a fourth, a fifth, or some subsequent one of the ever renewed attempts will ultimately succeed. In France, the first effort was defeated by Robespierre, the second by Bonaparte, the third by Louis XVIII. and his holy allies: another is yet to come, and all Europe, Russia excepted, has caught the spirit; and all will attain representative government, more or less perfect. This is now well understood to be a necessary check on kings, whom they will probably think it more prudent to chain and tame, than to exterminate. To attain all this, however, rivers of blood must yet flow, and years of desolation pass over; yet the object is worth rivers of blood, and years of desolation. For what inheritance so valuable, can man leave to his posterity? The spirit of the Spaniard, and his deadly and eternal hatred to a Frenchman, give me much confidence that he will never submit, but finally defeat this atrocious violation of the laws of God and man, under which he is suffering; and the wisdom and firmness of the Cortes, afford reasonable hope, that that nation will settle down in a temperate representative government, with an executive properly subordinated to that. Portugal, Italy, Prussia, Germany, Greece, will follow suit. You and I shall look down from another world on these glorious achievements to man, which will add to the joys even of heaven.