The Baltic manorial archives have suffered large losses bevause of wars and revolutions, but some parts remain. One of these is the Stackelberg family archive (EAA.1862), preserved in Tartu. Notable from a GNW perspective are some volumes connected to Carl Adam Stackelberg (1669-1749), who first served in Livonia and later in the German provinces as well as during the Norwegian campaign in 1718. One of the earliest volumes is EAA.1862.1.16, which is labelled Memoriale /Konzepte/ und Schreiben an Könige, Generäle und Andere aus der Zeit des Nordischen Krieges und später and supposedly containing items from 1708-1710.
The content is however of a different nature The largest document discusses whether it would be a good idea if Frederick of Hesse became King in accordance with the wishes of his wife Queen Ulrika Eleonora. The undated and anonymous memorial was obviously written some time in late 1719, after the Diet of 1719 and before the Diet of 1720 had started. The author is quite enthusiastic about Frederick, but formulates some conditions for his succession to the throne. If for example the Queen died the King should not be permitted to marry without the consent of the estates. The author is also very concerned about the future of the constitution, suggesting that one way to avoid an return of autocracy would be a sort of federal system made up of Sweden, Scania and the Baltic provinces. If two of these in one way or another agreed to the restoration of autocracy the third part could (if I understand the argument correctly) refuse to take part and seek support from foreign powers.
The author also believes it necessary to put Frederick on the throne in order to further pursue the war against the Czar. Without strong leadership it will be impossible to make an impression on the Russian ruler and to start a military operation to recapture Livonia. (This was of course very high on the agenda of the Swedish government after the death of Charles XII, i.e. to make peace with the other enemies, form a large European alliance and then undertake a large joint attack on Russia in order to force the Czar to moderate his terms. The Treaty of Nystad in 1721 was the logical conclusion to this rather far-fetched scheme).
As far as I can tell none of the documents are in fact from 1708-1710, but rather about a decade younger.