I just completed this quest, and noticed during the cut scene just after planting Erik's device that he says the following:

"There are fiends about, Nuala. They are often drown to the lingering scents of blood and death."

Instead of drown, this should be drawn.

I did a quick perusal of the etymology for drawn, but could find nothing to suggest an olde English spelling of it as drown, thus I am posting this as a bug.

I tried searching for this, but could not find an existing thread about this topic. If my search skills were found wanting and there is another thread about this, I apologize for the duplication.