The man is worth a look into his life:
Johann Georg von Langen (born March 22, 1699 in Upper Town, † May 25, 1776 in Jægersborg near Copenhagen) was a German forestry and Oberjägermeister and Norwegian Generalforstmeister.
Langen was born as the eldest son of the originally Emslander family of Langen in the manor house Oberstadt, which had acquired his ancestor Humpert of Langen († 1614) in 1606. His father was the feudal lord of Oberstadt and his mother court lady with the Duchess of Saxe-Meiningen. In his youth von Langen worked as Hofpage. When the Duchess died, he moved to the court of her brother, Duke Ludwig Rudolf of Brunswick-Lüneburg to Blankenburg in the Harz. Already in 1716 he was called a hunting page. In 1719, the Duke allowed him an educational journey and. a. to the farms in Stuttgart, Munich and Vienna, to further educate themselves in hunting. When he returned to Blankenburg after many years, he carried out the taxation and surveying of the Harz forest.
In 1737 he went through the mediation of Count Christian Ernst to Stolberg-Wernigerode to Norway, to work there on behalf of King Christian VI. of Denmark to promote mining and forestry. Its main site was Kongsberg. In 1742 he returned to Braunschweigische due to various difficulties and initially spent some time in Wernigerode and Blankenburg, before he became head of the forests in Fürstenberg in the Weserkreis. Due to unrest in the Seven Years War he returned in 1760 in the Harz. Due to an intrigue, the victim of which he became, he decided in 1763 to enter a second time in Danish services. There he ordered, among other things, the forestry conditions on the island of Zealand. (Source in excerpts: Wikipedia)