Thanks, Peter2. I may be misunderstanding you. When you said buttons I was thinking levers and I've pulled all I could find. The only button I've found so far was in the NE corner, upstairs in that round room. That opened a door in the main East hallway, which in turn led to a lever to open a door in the South middle which in turn allowed me to get to that secret "red" door behind which is Lever 8. Lever 8 opens the door to the round room on the SouthEast corner where there is a button that will open Door 9. I'm stuck at the "red" door.I know that each corner room has a buttone but so far I've only gained access to ONE of those four buttons (see above). If I'm reading you correctly, you're saying there are other buttons, one of which should open the door I'm stuck at. I'll go look for them, but if you know where they're at, I'd appreciate hearing from you.
Thanks again!