Just a lot of patience! Stood there for some time before I had the opportunity to take it 'clean'. There was one guy showed up on the shot (whom I hadn't seen) through the arches on the next floor down but I managed to clone him out! Thank you for this comment and for the others you made! Much appreciated.
You're welcome Len, I've been bussy with all other things than DA :-D Got a little bit bored with it and there are to many other things that interest me as well. So is just a matter of time management. Gr. Wil