Interesting, though - obviously, - we will not know of this until Claus and Portia return to the cave.
While we are on the topic, or, rather, on related topics, - and this is a matter about which I know nothing as yet - could we have Claus (@Plutonius) inquire as to whether the goblin we had left tied to a tree was killed within the same time frame, or met his end through Warhim's escape?
Master Fletcher set out seconds after Warhim's flight from the battle, and went immediately to the prisoner.
From the description, he had not just being killed, but it happened some time before (blood takes a long time to dry completely)
so i am guessing the Master Fletcher's Friend in Black must have been at the back of the entire business