Nooooooo, dont ignore please! I'm in the exactly same situation, I have found 3 of the parchments, the Gamol, Witega, and Scopgereord parchment, and Im also pondering on where the last one is. And trying to understand what the marker near the Bandit Camp is trying to say. Last parchment is inside the Bandit Camp? Cause I know I missed a couple locked chests and doors in there, wich I didnt found the keys for.
Meh, I actually found it in the end. Answer was on this forum, I just used the wrong words when searching xD
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Board=34&Number=389345