Many thanks, I do appreciate the effort! I realize what a tough one this is. And what doesn't help is that the original picture measures only about 1"x 2" and when you try to make it bigger, it just pixilates out.
It wouldn't matter so much except that as I said, this is the only picture we have of him. He died more than 40 years before I was born, and none of his 12 grandchildren ever even met him. He's just been a name on my Dad's birth and marriage certificates.