Katjes is a very kind cat (it took months until he trusted me, but now he is really friendly). This photo is unflattering, he seems grumpy but he wasn't.
@casablanca Many thanks for stopping by. I think he was just hiding until darkness. This house is old, also are the stairs. A a lot of crumbs fall down on the underside, Katjes has some kind of dust of abrasion on his head. I'm sure: as soon as he becomes more trustful, he will be playful, too :)