Need a very late game hint - spoiler tags only please

[Harwin]

There are 4 things I'm working on, and I'm not sure which are dependent on each other.

I'll put a small spoiler tag on a brief description of which puzzle it is, and then a longer spoiler description of where I'm at and what I'm looking for.

1) 'infinity' clock face -- Is this one code or a sequence of 4? (I have some reason to believe it is a sequence, but that would be a first for a code like this). Does this depend on any of the other things below to be solved?

2) blue "holly" door -- I assumed I needed to return with the crown, but that didn't do it. My next guess is I must solve number 1 above. Alternatively... be in dare mode?

3) 8th found room -- I have found, Conservatory, Mechanarium, Lost&Found, Throne, Tunnel, Planetarium, Secure Wing. I don't know what the eighth is. Do I need to solve one of these others to find it?

4) 7th red envelope -- I've found Drawing Room, Drafting Studio, Shelter, Office, Studio, "Orchard(the missing envelope)", Boudoir. I assumed the last would be in room 46, based on something the fortune teller said, but I have not found it.

Vague hints are better than explicit, please. Thanks.

[Silyon]

1) I confess I don't know what you're referring to here. Sorry.

2) The Holly Door -- Have you tried playing around with the Shrine outer room? Some of the blessings do interesting things to otherwise persistent rooms.

3)The found floorplans -- Are you quite sure you found everything of value in ALL of the safes?

4)The Red Envelope -- Ever wonder where that side-path in the tunnel leading to the North Lever leads?

[Harwin]

Thanks!

3) Found floorplans -- I had missed the secure wing redprint the first time, but I guess I'll check the others thoroughly as well, including 46.

4) ... I literally never saw that before. WTH Update: This was where both the missing letter AND missing room were

[Gorlom[Swe]]

2: you need to solve 1 first.

1. sequence of three, not 4. There might be a helpful clue in the geography classroom.

[Harwin]

1. Thanks! I do have copious notes from that and generated the blue card as well. Will check again.

2. Also thanks. Saves time attempting them in the wrong order.

[Gorlom[Swe]]

I probably should mention that it is in regards to the 4th line. I couldn't figure that out without the geography classroom, but others might see it as obvious.