Found him! pheww!
There is a lady two doors up that he likes so I went to ask if she had seen him and he was on a chair in her back yard.
I think he has been attacked by a dog or got into cat biffo. He is very scruffy with slobber on him and a very sore leg. I have put the fan on in the bedroom and put him on his pillow. He doesn't want anything to eat or drink and cries when I pick him up.
He is not going out now for a while. I have him under observation, but I may have to get some antiboitics as I think there is a small wound on his leg.