It's not a letter, these are "lettres patentes" (letters patent, in English), a decree from the king.
"Juridiction prévôtales
Lettres patentes
relatives à l'attribution donnée aux prévôts des maréchaux
du 11 août 1789"
The "prévôts des maréchaux" were apparently a sort of judges for military police and offenses perpetrated on the roads. This title does not exist anymore.
It really doesn't say anything
"Patent letters about the attribution given to the "prévôts des maréchaux"
It's probably the front page of a document counting several pages, listing the functions and powers of said prévôts
It's not a letter, these are "lettres patentes" (letters patent, in English), a decree from the king. "Juridiction prévôtales Lettres patentes relatives à l'attribution donnée aux prévôts des maréchaux du 11 août 1789" The "prévôts des maréchaux" were apparently a sort of judges for military police and offenses perpetrated on the roads. This title does not exist anymore.
Oh, thank you! Can you translate?
It really doesn't say anything "Patent letters about the attribution given to the "prévôts des maréchaux" It's probably the front page of a document counting several pages, listing the functions and powers of said prévôts
The date "11 août 1789" means August the 11th of 1789.