To steal sir Patricks title deed you have to look outside for a teleporter (look to the west, NOT outside the fence). It will teleport you inside and you will see 5 doors 2 at the top 2 at the bottom, and one to the left, you have to get in the left one, by going through the other doors and pulling levers (I can't remember the right combination though, sorry).
To get in touch with the assinns guild, well it's realeted with the title deed.
