I cleaned out the sewers, freed the slaves and exited on the boat. Went back to copper coronet and cannot find Hendak. I did not see him, get the quest finished in my journal or receive any g.pieces. Now several party members (Nalia, Aerie and Anomen) are nagging about their quests and I don't know what to do. I did complete the puzzle and got the sword. Thanks.

Once you let Hendak out of his cell, he and his fellow slaves fight their way out to the main hall. He should be there up where the bartender/storekeeper hangs out.