This is very cool, Annabelle ... I've taken pictures of everything of course, of this note and the stones and wondered already if and where we might need them, so, just in case I took those shots and when it was so easy to just link to Schatzkammern I didn't think of the rest anymore ... Yes I've seen the NOSW letters on the ground but I had no idea what to make of it ... Then in the Schatzkammer of Elodea's Schatzkammern I've seen this Tunnelgang linking place too, but then I didn't suspect anything anymore lol ...
Of course, I just immediately applied the note hint to that linking room et voilà ... awesome and familiar view ... now we know what those peeps in the key room have been stumbled upon while sitting there and walking and working in those tunnels and unknowingly doing their job year after year ... Very nice, thanks ...
As of the other stuff, I've seen some of this of course also, and I've been wondering about the deceiving cloth, which belongs to Schatzkammern, but when you don't know it and wonder how to get there as you're are looking for the last one, which was very difficult to find, as for the correct doors, then jumping up sth and finding the way to the cloth, then jumping down and being glad to have a door knob to leave again ... That was a journey ... O_o ... haha ... Yeah, great to now know one of the last secrets for now ...