Clue 1: Ok C1 so that narrows it down a lot - you are still looking for something enshroud in Darkness, darkness would be what colour? And the Pins - well 2 ways to look at this hidden pins will hold items to a wall but pins is also a slang term for legs. Both pins and legs would work in this case.
Found:
You are in Morcraven cave [18,178]
Black cloak room
between 2 chairs