Origin of the pictures:

quest_generic.base.111.png
 Based on http://commons.wikimedia.org/wiki/File:Old_map_of_Tianjin_City.jpg which is public domain.

quest_scorn_CoffeeGoose.base.111.png
 Combination of https://commons.wikimedia.org/wiki/File:Question_mark2.svg (public domain) and the monster/animal/farmyard/goose.base.131.png picture.

quest_scorn_aristocracy.base.111.png
 http://commons.wikimedia.org/wiki/File:George_Cross_icon.svg by Zscout370, which is under GPL2 or CC-BY-SA 3.0

quest_lake_country_undead_catacomb.base.111.png
 Wraith image from Wesnoth, http://wesnoth.org/ and under GPL2 licence

quest_darcap_elemental.base.111.png
 http://commons.wikimedia.org/wiki/File:Zywioly03.png by Ratomir Wilkowski, www.R-K-P.prv.pl under CC-BY-SA 3.0

quest_darcap_temple_justice.base.111.png
 http://commons.wikimedia.org/wiki/File:3enighed.svg which is public domain

quest_scorn_gates.base.111.png
 http://commons.wikimedia.org/wiki/File:Password.svg by David Vignoni and under LGPL 2.1

quest_scorn_hero.base.111.png
 http://commons.wikimedia.org/wiki/File:Feuille_aldine_du_XVIe_si%C3%A8cle.svg under public domain

quest_scorn_kelthior.base.111.png
 http://commons.wikimedia.org/wiki/File:Knowledge-Reid-Highsmith.png under public domain in most of the world