King of Great Britain and Ireland from 1760 until his death in 1820. His reign was marked most notably by the loss of British control over the American colonies. Advancing mental illness rendered George unable to fulfill his official duties during the last decade of his life, during which time the Prince Regent, William IV, ruled in his stead. ALS signed “George R.,” one page, 7.25 x 9, September 26, 1800. Letter to his son Fredrick. In part, “Regulars and Volunteers as also the proper Officers to meet as a committee to examine the plans for the intended Military College arrive this morning which all meet with my approbation.” In fine condition, with a bit of light toning and mailing fold touching bottoms of a couple letters of signature. LOA John Reznikoff/PSA/DNA and R&R COA.