Complex sentence: He bought St Leonard's Hill in Clewer from the Duke of Gloucester in 1781 and, having been promoted to major-general on 20 November 1782, he was then appointed Deputy Ranger of Windsor Great Park.
Split into simpler sentences: He bought St Leonard's Hill in Clewer from the Duke of Gloucester in 1781. Promoted to major-general on 20 November 1782, he was then appointed Deputy Ranger of Windsor Great Park.