Hi guys, new to forum, also pretty new to the game. Luckily not the genre
I just went on a rampage through the Dead Nations (after failing to pickpocket Hargrimm, was getting tired of asking it the polite way), which was fairly easy to my surprise. I also collected the heads of the 'important' people there (hargrimm, stale mary, the ghoul-queen-thingy and Soego orso), and i was wondering if there was anything i could do with those (perhaps collect a reward somewhere

?).
I've already searched some walkthroughs and stuff, and it seems i need one of the heads in the Lower ward orso? but that still leaves me with the other heads.. or should i just drop them and empty my bag a bit?