I haven't read the Farseer trilogy in quite some time, but I recently read the Tawny Man trilogy.
In the Tawny man, The Pale Woman is described as another White Prophet, and behind the outislander trouble that the Six Duchies faced during the Farseer trilogy.
However, I can't remember reading about her in the Farseer trilogy. So was she mentioned at all in the Farseer trilogy or was she just thought of later by the author?