ToME: the Tales of Maj'Eyal

Toon is lvl 12 cornac rogue named Poison Ivy. Entered the trapdoor. In first lvl wals were not digable, which seemd odd t me as iu remember that otherwise. in the second lvl, the master assasin was just not there. i dispatched the guards. trader wasnt talking for me afterwards and searched all over the place for the assassins lord (his normal location is right beyond the trader). i putt 3 generic in see invisible and had a lamp +3 invisible. didnt help. Killing trader dooesnt help either. no stairs to be seen. After recalling out, quest was finished trader was saved.
but still assasin lord not at home