Well, he isn't back yet.....
However, we have had a report from some people 2 streets over. They feed some feral cats, as well as having 5 of their own, and have a super, cat friendly garden with a fountain and a little house the cats sleep in.
These people are convinced they have seen Odin. He is apparantly been in a bad fight with another cat- not a surprise as he is so gentle he'd never last in a fight with a wild cat.
This cat that might be Odin seems very timid, and the couple have tried to catch him, but they don't want to scare him off permanently so they are being very gentle and reserved about it.
They have taken a picture of the cat so I am going over there today to see if it is indeed Odin. If so, the couple, who also do trap-spay-release of feral cats will step up their efforts to catch him, they are apparantly quite good at getting reluctant cats.
Thank you so much for the good wishes, it does mean a lot to know people all over the world are rooting for Odin. Keep your fingers crossed!