This quest is yet another annoying bug in an otherwise great game. The head is not there. I went so far as to get the coordinates from someone else's playthrough, and it simply is not there. Very frustrating, especially without a built in dev console to add things like this in.
I understand not wanting to promote cheating, but when a game has this many hitches after how many updates? A dev console should have been added as there are just so many moving parts in the background here.
I'll recommend the game to anyone who asks, but I tell people to be prepared for at least 10 unfixable quest breaking bugs; before you are out of the Driftwood area. Again, there are so many things going on, so many options, so many quests, so many variables, it's easy to want to punt a penguin, but hard to actually get mad at Larian as it is a flawed masterpiece. That's a heck of a lot more impressive than "Technically perfect, average 5 out of 10 game."
Next game we are expecting a Baldur's Gate 2 + Throne of Bhaal story + more Larian style story tweaks and freedom with upgraded Dragonage: Origins graphics. AND a DEV Console FOR BUGS. This head not being at *SPOILER* 579/157 is not cool.
"There is enough youth in this world. How about a fountain of smart?"