So in this scenario, why is he dying? Before, we were unsure that his cataplexy was getting worse; I pointed out that on-screen he seems as active or more active than ever. But Bones says: "And you seem to be resting more and more frequently, as time goes on." and she would know. Are we speculating that whatever dupe's body that Riddle stole is breaking down 60-odd years later after Albania?