Simplify the following text for a Grade 6 native English-speaking person.
Original: The Prince Alfred ( 22 September 1780 -- 20 August 1782 ) was a member of the British Royal Family , the fourteenth child and ninth son of George III .
Simplified: Prince Alfred ( 22 September , 1780 - 20 August , 1783 ) was the ninth and last son of George III and Queen Charlotte .