By Anne Briggs
and Bert Jansch
and the Jimmy Page version of the Bert Jansch version
and the Carla Luft version of the Jimmy page version of the Bert Jansch version
There is much discussion of whether Page stole his version from Jansch, which is made entirely academic by the Anne Briggs version, which in my opion is simply perfect.
More about Anne Briggs here: a recent Anne Briggs interview