I transmit to you two despatches which were receiv'd from Mr. Rush, while I was lately in Washington, which involve interests of the highest importance. They contain two letters from Mr. Canning, suggesting designs of the holy alliance, against the Independence of So. America, & proposing a co-operation, between G. Britain & the U States, in support of it, against the members of that alliance. The project aims, in the first instance, at a mere expression of opinion, somewhat in the abstract, but which, it is expected by Mr. Canning, will have a great political effect, by defeating the combination. By Mr. Rush's answers, which are also enclosed, you will see the light in which he views the subject, & the extent to which he may have gone. Many important considerations are involved in this proposition. 1st Shall we entangle ourselves, at all, in European politicks, & wars, on the side of any power, against others, presuming that a concert, by agreement, of the kind proposed, may lead to that result? 2d If a case can exist in which a sound maxim may, & ought to be departed from, is not the present instance, precisely that case? 3d Has not the epoch arriv'd when G. Britain must take her stand, either on the side of the monarchs of Europe, or of the U States, & in consequence, either in favor of Despotism or of liberty & may it not be presum'd that, aware of that necessity, her government has seiz'd on the present occurrence, as that, which it deems, the most suitable, to announce & mark the commenc'ment of that career. My own impression is that we ought to meet the proposal of the British govt. & to make it known, that we would view an interference on the part of the European powers, and especially an attack on the Colonies, by them, as an attack on ourselves, presuming that, if they succeeded with them, they would extend it to us. I am sensible however of the extent & difficulty of the question, & shall be happy to have yours, & Mr. Madison's opinions on it.[57] Jefferson's reply dated Monticello, October 24th, displays not only a profound insight into the international situation, but a wide vision of the possibilities involved. He said: