You definitely stumbled on them at some point. I constantly forget to do the 'next page' thing on stuff I find, so I didn't realize what they were at first.
fun synergy: combining the hovel (allows you to pay for special rooms with stamina rather than gems) and the nurse station (sets stamina to 20 if stamina < 10) is pretty busted, as long as you don't get too far away from the nurse's station towards rank 8
omfg i was SO CLOSE to getting into the antechamber. i even managed to find the greenhouse as my last available draw backtracked halfway through the house, but of course that turned out to allow the only antechamber entrance i couldnt actually access
Comments
those are the ones we've found so far
also the letters don't change but the gems respawn so opening the safe is still worth doing