Tier 10 and 11 of the Dawning of an Endless Night Story Quest in The Secret World
For the 10th tier of the Dawning of an Endless Night quest, you need to go to the Academy and through the door at the area marked on your map.
When you get inside, search room by room collecting the highlighted symbols until you have the Star of David, Masonic Symbol, The Eye, Skull and Templar Cross. The others are not needed.
The order to input them is :
1st:Star of David(Bottom Right)
2nd: Masonic Symbol(Top Right)
3rd: The Eye(Lower Middle Right)
4th: Skull(Upper Middle Right)
5th:Templar Cross(Upper Middle Left).
This will grant you access to the Library. When you enter, there will be a cut-scene followed by a quest to find a book. In order to get to the book, you need to go to the opposite side of the room that you start out in, so hang a left or a right and work your way over, killing any custodians that get in your way. Then cross through the archway and you will have to fight the Archavist.
[Note: I had to fight him before I got to the book, while Unfair did not have him spawn until after he looted the book and was making his way out]
After reading it, you must escape the archives. In order to do this, you need to go back up to the Archivists room and stand on the symbols on the floor in order to activate them.
Both me and Unfair just randomly stepped on them until all of them lit up and the secret passage was revealed. In took less than 10 seconds for each of us and we both do not know the exact sequence. Just experiment with it, it shouldn’t be too bad.
Go through the opened passageway, and you will have 1 monster to fight before finishing the solo instance and being ready to move onto the next part.
Dawning of an Endless Night Tier 12 Guide: Here