Mine was Tiger Brown, I like musical names for my animals when it seems good because I am a musician and there are so many good choices always in my head.
He would never let me really pet him. He would lay beside me and let me use one finger on his head and ONLY his head. He was very special as he would come into one room only and only stay longer when the weather was really bad. I loved him so much. He seemed old when he came the first time but he was with me for seven years.
He was old and he left one day and never came back. It took a long time to stop looking, in fact there is one out here now that looks so similar that I have to call his name but he runs every time.
Those kinds of cats are especially precious, at least I think so. The trust they have in you is so special. I hope if he does not come back you can at least feel a tiny bit of grief taken away by your memories, that was an incredible and wonderful thing you have done.
Tiger Brown used to do this to me now and again so I know that feeling that every one of us has when taking care of a cat like that does not come home.
Sending good thoughts.