"Gladstone is an extremist who is threatening to attack the Guild if we do not suspend our operations in the Sanctuary; the nest of all anti-guild movements. Arrest him. He is somewhere in Saintspring."
How to CompleteGo to the spot 2 steps the bridge in Saintspring and head straight east (right). You will be attacked by Gladstone when you reach the shore. You know what to do then.
Note: You may notice Gladstone seems to be a step north from the spot where you find the target of the next quest - Duncan. Unfortunately it's not possible to jump from on spot to the other, the game forces you to take the path starting from the road. The cliff-face path to Duncan is separate from the one to Gladstone (see picture)