hi, all,
Am doing Dawnguard ATM, am in Forbears' Hideout. in front of me is the Moth Priest surrounded by some powerfield and I don't know how to release him. Found a button on a small staircase, pressed it, got message: 'You don't have the needed object' or something in these lines.
Could someone tell me how to release the priest, please?

Did you kill Malkus, the leader of the kidnappers? You need to take Weystone Focus from his body and put it on the pedestal.