The TW people had suggested Sigura, and the personality issue fits my Dad's description. I had read the wiki pages on him last week, and got worried that maybe my memory of the story is faulty. But I specifically remember the third-degree burns in the article--muscle destruction. Or perhaps the article was wrong!!
But I could use Segura's story instead of the one I am searching for. I did not know about his premie birth. And yes, I had noted that he was 'only' in his 90's!!! He's still a young man!!!
Thanks for your help. I'll keep looking for another week, and then if I don't find 'my guy' I'll go with Segura.
Does anyone know where Segura lives?