As my grandfather used to say in a moment of puzzlement ; "Was ist dieser?"
Knecht : Le Portrait musical de la Nature - Philidor : Ouvertures Le Jardinier et Son Seigneur, Le Sorcier, Tom Jones & Le Maréchal-Ferrant / Orchestra Filarmonica di Torino - Prague Sinfonia Orchestra - Christian Benda, direction
http://classique.abeillemusique.com/CD/Classique/8573066/0747313306671/Naxos/Justin-Heinrich-Knecht-Francois-Andre-Danican-Philidor/Le-Portrait-musical-de-la-Nature/cleart-79663.html (http://classique.abeillemusique.com/CD/Classique/8573066/0747313306671/Naxos/Justin-Heinrich-Knecht-Francois-Andre-Danican-Philidor/Le-Portrait-musical-de-la-Nature/cleart-79663.html)
Answer: the Knecht work is a late-classical programme symphony (dating from 1784-5) which may or may not have influenced Beethoven's Pastoral Symphony. The overtures fall outside the remit of this website, being by François-André Danican Philidor (1726-1795) from the mid 18th century.
Not exactly unknown unknowns. More unfamiliar unsungs...