Franciszek Ksawery Woyna - adjutant and chamberlain of King Stanislaw Poniatowski, general and commandant of the Cadet Corps in Warsaw, more about this figure here.
Letter handwritten on handmade paper.
In Łazienki on 10 aug. 1779
Letter under my Envelope de date 15 pr. Sent, I have given to the King His Majesty . He has ordered me to write back to Mr. Dobr that he not only does not want you to attend the Sejm Courts but also demands that you be present at the first session of the Courts, which is on August 23rd. Having said that, I commend myself to your friendship. J'ai l'honnoeur d'etre
Votre tres humbelan Servetem
Woyna