The story of Prince John, the autistic and epileptic youngest son of Queen Mary and King George V, who spent his whole life hidden away from public view and died at the age of 13 in 1919.The story of Prince John, the autistic and epileptic youngest son of Queen Mary and King George V, who spent his whole life hidden away from public view and died at the age of 13 in 1919.The story of Prince John, the autistic and epileptic youngest son of Queen Mary and King George V, who spent his whole life hidden away from public view and died at the age of 13 in 1919.