In Sharyn McCrumb's new novel Songcatcher (NO relation to the movie!) she mentions an old woman in Scotland in the 1700's who was a healer and "knew things," i.e. had the "second sight" and was rumoured to have become that way by drinking from branigh's cup.
When I tried a search on google it kept telling me I meant "branagh," the actor!
Anyone know this legend? That part of the novel takes place on the "Rinns of Islay." Don't know if that is real or not.