But it must seem extraordinary, that the sovereigns of all the different countries of Europe should have exchanged in this manner for a rent certain, never more to be augmented, that branch of their revenue, which was, perhaps, of all others, the most likely to be improved by the natural course of things, without either expense or attention of their own; and that they should, besides, have in this manner voluntarily erected a sort of independent republics in the heart of their owndominions.