Curiously enough such alliances were in direct contravention of the existing laws of the German Empire. At the Diet held in Worms, 1231, the princes had expressed marked disapproval of such leagues, in which they clearly recognized a dangerous rival power. But the cities seemed little troubled by this interdict. They, on their part, recognized that the time had come for a firm union, and adhesion of the weak against the strong, and more and more, as they saw that the empire threatened from within and from without was visibly falling asunder. For what respect could be felt for a crown which was at last actually put up for sale to the highest bidder, and acquired by the rich but otherwise impotent brother of the English Henry III., Duke Richard of Cornwall? [Illustration: ROBBER KNIGHTS. (_From Fritoch._)] The towns of the Rhine were the first to form themselves into an alliance, a fact that can scarcely surprise us when we remember how thickly set is that lovely river with the now ruined strongholds of what erst were robber lords. And the Baltic towns were not slow to follow in their wake, forming a League "for the benefit of the common merchant." These cities even settled the contingent which each town had to place at their common disposal, a great stone of possible stumbling being skilfully avoided by a phrase which occurs in a contract of 1296: "If the fight goes against a prince who is lord of one of the cities, this city shall not furnish men, but only give money." The Rhenish section alone was able to put into the field some eleven hundred crossbowmen and six hundred stout galleys; no mean army in those days. In a word, the times were out of joint, and the people had to help themselves, and did so. Sprung from modest sources, having its origin in true neighbourly feeling, what was at first a mere association of merchants had developed into an association of cities. The banner under which they had grouped themselves bore the device "freedom for the common merchant at home and abroad," and this device became the elastic but durable bond, which, keeping them together, made them a mighty power. Its very elasticity was the cause of its strength, giving it that facility of expansion and freedom from rigidity which in more modern times has made the glory and the might of England, whose constitution is distinguished by a like principle of flexibility. A naïve North German chronicler of the thirteenth century telling of the various alliances formed, writes: "But the matter did not please the princes, knights, and robbers, especially not those who for ever put forth their hands for booty; they said it was shameful that merchants should rule over high-born and noble men." Undaunted, however, by such objections, the cities continued to form alliances, to make contracts among themselves until these contracts assumed the extent, dignity, and importance of those made by the towns with their foreign settlements.