Baron Weissemberg then started for London, under the official pretext of bringing about a general peace, but in reality for the purpose of sounding the English cabinet upon the advantages likely to be offered to Austria, in the way of subsidies and accession of territory, in case she should declare openly in favour of the coalition, and should be willing to furnish so considerable a force as 450,000 men. Now all this occurred in the month of March 1813, and the armaments of Austria received a fresh augmentation, when the thunders of the artillery were heard at Lutzen and Bautzen; 200,000 men were already located in Bohemia: against whom could these immense bodies of troops be intended to act? At this juncture, Metternich again appeared in his mediatorial capacity, to prepare the armistice of Plesswitz, afterwards definitively settled at Nieumarch: Austria constantly declared that, as the conflicting armies occupied four hundred leagues of her frontiers, it was impossible she should any longer refrain from taking an active part in the struggle, if the belligerent powers would not agree to terms of reconciliation. A step was thus taken, from a state of alliance with Napoleon, towards a condition of armed neutrality, and how could so powerful a country as Austria long continue in this situation? In the heated state of the public mind in Germany, how was it possible to calculate the exact point where the mediation would stop for the _casus belli_? It was the interest of Russia and Prussia to keep on good terms with a court capable of drawing up a body of excellent troops 200,000 strong. After some bitter and ill-advised observations, Napoleon also accepted the mediation; it was a sort of break in the military operations, an expression of the weariness felt by an army now worn out with battles. We may see how great a part Metternich had created for Austria in these negotiations, for, on former occasions, the plenipotentiaries could treat the Austrian interests as a separate concern, while in her new position Vienna became the indispensable intermediate agent in any treaty that might be contemplated. The question was, Did Austria offer her mediation in good faith, with a sincere wish for peace? or was it merely as a lure, to enable her to render her military establishment more complete? This becomes an important question for history.