The Prussian monarchy was suddenly bereft of half its population, and now figured on the map as a disjointed land, scarcely larger than the possessions of the King of Saxony, and less defensible than Jerome Bonaparte's Kingdom of Westphalia; while the Confederation of the Rhine, soon to be aggrandized by the accession of Mecklenburg and Oldenburg, seemed to doom the House of Hohenzollern to lasting insignificance.[153] But the published treaty was by no means all.

There were also secret articles, the chief of which were that the Cattaro district--to the west of Montenegro--and the Ionian Islands should go to France, and that the Czar would recognize Joseph Bonaparte as King of Sicily when Ferdinand of Naples should have received "an indemnity such as the Balearic Isles, or Crete, or their equivalent." Also, if Hanover should eventually be annexed to the Kingdom of Westphalia, a Westphalian district with a population of from three to four hundred thousand souls would be retroceded to Prussia.

Finally, the chiefs of the Houses of Orange-Nassau, Hesse-Cassel, and Brunswick were to receive pensions from Murat and Jerome Bonaparte, who dispossessed them.
Most important of all was the secret treaty of alliance with Russia, also signed on July 7th, whereby the two Emperors bound themselves to make common cause in any war that either of them might undertake against any European Power, employing, if need be, the whole of their respective forces.

Again, if England did not accept the Czar's mediation, or if she did not, by the 1st of December, 1807, recognize the perfect equality of all flags at sea, and restore her conquests made from France and her allies since 1805, then Russia would make war on her.

In that case, the present allies will "summon the three Courts of Copenhagen, Stockholm, and Lisbon to close their ports against the English and declare war against England.