Got this misc quest in Ivarstead from talking to that hilariously voice acted guy called Narfi, and then the inkkeeper, Wilhelm. I'm supposed to look for Narfi's sister's (Reyda's) remains near or on the island that the Geirmund's Hall barrow is located on. The innkeeper says she was picking flowers around that area a year previous, and disappeared. I looked around there for...more time that was probably reasonable, but to no avail. Does anyone have a clue as to where her body is?

bump

Check under the place you normally find trolls, near Ivarstead.
Or, if you're not so good with subtle hints...

I figured out how to use the journal to select misc quest marks....and the clairvoyance spell. Thanks anyways.

Well I would have never have thought to look in the river for her - so thanks! You saved me from searching the Hall again.

I actually went back into the hall to search it again. Spawned new enemies, but like everyone else - no Reyda! A bit of a red herring. I did see the quest mark, but being a reasonably thinking human, I didn't think to look in the water. I did walk under the bridge and thought "this is weird", then passed it off as the village as the quest location. Now I could go back there and settle this one.

She is under the water just left of the Bridge southside of Ivarstead.