How Do I Get The Glass Key

How do I make Hadrian give me the glass key, all he does is look at me and lower his head and yes I have read the book of Durins Truth

 

Big story spoilers!!









Ok, not really.
Go to Roseborough and read the thing in front of the inn. Map out the co-ordinates (I had to) but to make it simple for you, they tell you to go east and south-east. But since on of the words on the tomb is opposite, you go west (hit the shore) and then northwest. Keep going, out of town, and you'll see this big wheel type thingy. Click on it and your character will say truth (assuming that you know that's the other word). Go in and take Mannox's sword and journal. Read the journal. Go back to the temple. Talk to Hadrian, he'll let you take it.