Very sorry to hear man, I hope he had a fulfilled life!
I've lost both my grandfathers. One I didn't know too well, I was only 8 years old when he past but the other I was very close to and being an usher was one of the hardest things I've had to do. (He lived around the corner from me). It's been a few years but I still think about him almost everyday. Parkinson's didn't stop him from coming to all my ball games and my cousin's as well. He was also the smartest man I ever knew.