1. I got the Quest 'Retrieve Rune Shards' and set off to Sarnur.
I'd previously seen Sarnur through a barred gate (go South from Noglond, cross the bridge and climb a slope...), but there was no way through. Does this open later? (I'm level 61.)
2. I found another way into Sarnur through Orodost, but then could not find Glumir anywhere - so eventually abandoned that Quest. Where is he?