The requested article, Quelaag's Domain does not exist...
Although this site is a constant work in progress, almost all work has stopped on it.
It is highly recommended that you check out one of the following excellent sites for what you are after:
- Dark Souls Walkthrough with Maps Wiki - Fantastic maps of all the location.
- Dark Souls Wikidot Wiki - a little ugly, but very complete.
- Dark Souls Wiki (Wikia version) - heavy on ads and a fair amount of content.