If this meant anything, it meant that Napoleon intended to stop the further progress of the Prussian army, to rescue Austria, and to dictate the terms of peace; it could not be doubted that he would be prepared to support his mediation by arms, and in a few days they might expect to hear that the French corps were being stationed on the frontier. What was to be done? Bismarck neither doubted nor hesitated; it was impossible to refuse French mediation. West Germany was almost undefended, the whole of the southern States were still unconquered; however imperfect the French military preparations might be, it was impossible to run such a risk. At his advice the King at once sent a courteous answer accepting the French proposal. He was more disposed to this because in doing so he really bound himself to nothing. He accepted the principle of French mediation; but he was still free to discuss and refuse the special terms which might be offered. He said that he was willing to accept an armistice, but it was only on condition that the preliminaries of peace were settled before hostilities ceased, and to them the King could not agree except after consultation with the King of Italy. It was a friendly answer, which cost nothing, and meanwhile the army continued to advance. An Austrian request for an armistice was refused; Vienna was now the goal; Napoleon, if he wished to stop them, must take the next move, must explain the terms of peace he wished to secure, and shew by what measures he was prepared to enforce them. By his prompt action, Bismarck, who knew Napoleon well, hoped to escape the threatened danger. We shall see with what address he used the situation, so that the vacillation of France became to him more useful than even her faithful friendship would have been, for now he felt himself free from all ties of gratitude. Whatever services France might do to Prussia she could henceforth look to him for no voluntary recompense. Napoleon had deceived him; he would henceforward have no scruples in deceiving Napoleon. He had entered on the war relying on the friendship and neutrality of France; at the first crisis this had failed him; he never forgot and he never forgave; years later, when the news of Napoleon's death was brought to him, this was the first incident in their long connection which came into his mind. Intercourse with Paris was slow and uncertain; the telegraph wires were often cut by the Bohemian peasants; some time must elapse before an answer came. In the meanwhile, as the army steadily advanced towards the Austrian capital, Bismarck had to consider the terms of peace he would be willing to accept. He had to think not only of what he would wish, but of what it was possible to acquire. He wrote to his wife at this time: