“ The estrangement of Frederick and Ferdinand in 1766 led to the duke’s retirement from Prussian service, but there was no open breach between the old friends, and Ferdinand visited the king in 1772, 1777, 1779 and 1782. After 1766 he passed the remainder of his life at his castle of Veschelde, where he occupied himself in building and other improvements, and became a patron of learning and art, and a great benefactor of the poor. ”

“ He exerted himself to compensate those who had suffered by the Seven Years’ War, devoting to this purpose most of the small income he received from his various offices and the rewards given to him by the allied princes. ”

“ FERDINAND, duke of Brunswick (1721–1792) , Prussian general field marshal, was the fourth son of Ferdinand Albert, duke of Brunswick, and was born at Wolfenbüttel on the 12th of January 1721. He was carefully educated with a view to a military career, and in his twentieth year he was made chief of a newly-raised Brunswick regiment in the Prussian service. He was present in the battles of Mollwitz and Chotusitz. ”