On a more on-topic note, take a look at the main tower. See that one forestman climbing really akwardly. Notice that he's suspended on a rope/string (were those ever released in castle sets?), and that the rope is held by an odd cream coloured harpoon piece. Any info on if it was released? If so, when?
Also of note: to the left of the main tower is a hilarious sight: A peasant apparently attempting to fight a BF (or they could be talking...but that's less fun). This is actually quite interesting, was a BF-themed peasant ever released?
And to FURTHER add to the confusion, look at the base of the main tower, across the river. Is that a BF standing there? Right next to the guys they're...y'know...fighting?
Whoops, going off topic here. I'll quit while I'm ahead.

I build, therefore I am. If I build nothing, AM I nothing?