Translation / modern text
The letter opens with “Monseigneur”; much of the text is illegible, but the phrases “attendu” and “Monsieur” are preserved. The dateline gives Warsaw, 10 February 1702. Page 50 is the addressed wrapper with a seal.
Original wording — transcription
[Nagłówek:] Monseigneur.
[…] attend[u] […]
[…] [tekst częściowo nieczytelny].
[Datownik:] w Warszawie d. 10 Febr 1702.
[Adres na obwolucie, s. 50:] A Son Excellence Monseigneur le Palatin General de Russie à Leopoli.
Reading notes
Page 49 contains the letter text; p. 50 is the wrapper with address and seal. Date and Warsaw are read from the dateline on p. 49.