...another slub letter? and a swatch advert 'where is the key?' well slub...Lublin comes to mind...but in point of fact, I have no idea...

let me see...gill appears to think that the 'key' was in a 'bootee'...kate's bootee - in that Blackheath house, I see....go figure:

http://biznes.wwa-pfd.biz.pl/inne-firmy/2ortqcsu6mymyl,najlepsza-wyszukiwarka-uslug-slubnych.html