The bed contains a hairclip that should be hidden until the player searches the bed. Unfortunately, this happens:
A soft goose-down bed fit for a queen.
In the bed is a hair clip.
SEARCH THE BED
A puff of goose-down escapes as you search the bed. You found a hair clip!
Obviously that doesn’t quite work. I tried to implement a rule:
The bed contains a hair clip. Rule for deciding the concealed possessions of the hair clip: if the hair clip is carried, no; otherwise yes.
but the rule does absolutely nothing.