The diagnosis was a tumor that had poisoned his system and blocked him up.
At least it wasn't a drug out death.
In his life we know he sired lots of babies before we got him neutered. We could sometimes hear him singing to the girls for blocks around. Later after being "fixed" he still made his rounds and still sang to the world. I think many of the neighbors hated him.
He caught birds once in a while and even bagged a couple of squirrels too.
He was hell on paws to outside interlopers, but kind and somewhat friendly to the other kitties we adopted over the years.
Last year we lost Charlie, Obie's friend for many years. Obie grieved. You could see it. For months he'd go outside and look for Charlie. I honestly don't think he ever got over that loss.
He slept with us most every night. Most of the time tucked up under my wife's chin on her pillow, and sometimes curled up by my arm with his head on it.

Rest in peace my little friend, I'll see you at the Rainbow Bridge.
Joe