The full truth on this subject is not known. M. Élie de Cyon, who claims to have seen the document, states that Austria undertook to remain neutral during the Russo-Turkish War, that she stipulated for a large addition of territory if the Turks were forced to quit Europe; also that a great Bulgaria should be formed, and that Servia and Montenegro should be extended so as to become conterminous. To the present writer this account appears suspect. It is inconceivable that Austria should have assented to an expansion of these principalities which would bar her road southward to Salonica[115]. [Footnote 115: Élie de Cyon, _Histoire de l'Entente franco-russe_, chap, i.; and in _Nouvelle Revue_ for June 1, 1887. His account bears obvious signs of malice against Germany and Austria.] Another and more probable version was given by the Hungarian Minister, M. Tisza, during the course of debates in the Hungarian Delegations in the spring of 1887, to this effect:--(1) No Power should claim an exclusive right of protecting the Christians of Turkey, and the Great Powers should pronounce on the results of the war; (2) Russia would annex no land on the right (south) bank of the Danube, would respect the integrity of Roumania, and refrain from touching Constantinople; (3) if Russia formed a new Slavonic State in the Balkans, it should not be at the expense of non-Slavonic peoples; and she would not claim special rights over Bulgaria, which was to be governed by a prince who was neither Russian nor Austrian; (4) Russia would not extend her military operations to the districts west of Bulgaria. These were the terms on which Austria agreed to remain neutral; and in certain cases she claimed to occupy Bosnia and Herzegovina[116]. [Footnote 116: Débidour, _Hist. diplomatique de l'Europe_ (1814-1878), vol. ii. p. 502.] Doubtless these, or indeed any, concessions to Austria were repugnant to Alexander II. and Prince Gortchakoff; but her neutrality was essential to Russia's success in case war broke out; and the Czar's Government certainly acted with much skill in securing the friendly neutrality of the Power which in 1854 had exerted so paralysing a pressure on the Russian operations on the Lower Danube.