that the two Powers would decide only in concert on the relations of the duchies, and that they would in no case determine the question of the succession save by mutual consent.
At this stage, had the Danes yielded to the necessities of the situation and withdrawn from Schleswig under protest, the Euro pean Powers would probably have intervened, a congress would have restored Schleswig to the Danish Crown, and Austria and Prussia, as European Powers, would have had no choice but to prevent any attempt upon it by the duke of Holstein. To pre vent this possibility Bismarck made the Copenhagen Government believe that Great Britain had threatened Prussia with interven tion should hostilities be opened, "though, as a matter of fact, England did nothing of the kind." The cynical stratagem suc ceeded; Denmark remained defiant ; and on Feb. i, 1864, the Austrian and Prussian forces crossed the Eider.
Bismarck determined to use this circumstance to revise the whole situation. He urged upon Austria the necessity for a strong policy, so as to settle once for all not only the question of the duchies but the wider question of the German Confederation; and Austria reluctantly consented to press the war. On March 5 a fresh agreement was signed between the Powers, under which the com pacts of 1852 were declared to be no longer valid, and the posi tion of the duchies within the Danish monarchy as a whole was to be made the subject of a friendly understanding. Meanwhile, however, Lord John Russell on behalf of Great Britain, sup ported by Russia, France and Sweden, had intervened with a proposal that the whole question should once more be submitted to a European conference'. The German Powers agreed on condition that the compacts of 1852 should not be taken as a basis, and that the duchies should be bound to Denmark by a personal tie only. But the proceedings of the conference, which opened at London on April 25 only revealed the inextricable tangle of the issues involved. Beust, on behalf of the Confederation, demanded the recognition of the Augustenburg claimant; Austria leaned to a settlement on the lines of that of 1852; Prussia, it was increasingly clear, aimed at the acquisition of the duchies. The first step towards the realization of this latter ambition was to secure the recognition of the absolute independence of the duchies, and this Austria could only oppose at the risk of f or feiting her whole influence in Germany. The two Powers, then, agreed to demand the complete political independence of the duchies bound together by common institutions. The next move was uncertain. As to the question of annexation Prussia would leave that open, but made it clear that any settlement must in volve the complete military subordination of Schleswig-Holstein to herself. This alarmed Austria, which had no wish to see a further extension of Prussia's already overgrown power, and she began to champion the claims of the duke of Augustenburg. This contingency, however, Bismarck had foreseen and himself offered to support the claims of the duke at the conference if he would undertake to subordinate himself in all naval and military mat ters to Prussia, surrender Kiel for the purposes of a Prussian war harbour, give Prussia the control of the projected North Sea Canal, and enter the Prussian Customs Union. On this basis, with Austria's support, the whole matter might have been arranged without—as Beust pointed out (Mem. i. 272)—the increase of Prussia's power beyond the Elbe being any serious menace to Austrian influence in Germany. Fortunately, however, for Bis marck's plans, Austria's distrust of Prussia led her to oppose this settlement and at her instigation the duke of Augustenburg rejected it.