This is SVN 4829 Macintosh.
Ok, I carried the silver key into the “fan house” and left it by the front door.
After getting the red key to open the lock to get out – and returning to the door with the red lock, I found that the silver key had vanished.
Would it have been moved somewhere else, or did I lose it when I went out of FH-part 1 and then back again?
Would it be better to leave the key outside the house?
I’ve noticed that when I’ve gone through a “house” and then come back to it later, everything has been re-set to its original state. From reading some other posts, I got the impression that keys would be persistent wherever they were left.
Anyway, I guess I’ll have to go back to my last Save and continue anew from there.