Is he by any chance HUGE and long haired, mostly white?
If it's the same cat he's been in our garden with our cat and the two get on like a house on fire.
My girlfriend tells me Mordechai (Bruiser to us) was through again yesterday
There's also another cat who comes through who we call Hitler. He's mostly white and with a distinct uninterrupted black marking from hip to tail and he also has a tiny little Dictator moustache.
Would be nice to know if anybody owns him as he comes through sporadicly and we've started to leave food down as he was a shadow a few weeks back.
He also seems to offend all our cats sensibilities so we think he's probably just itinerant male