There are four waypoints on your way to kill Kelynn. Just go to the area marked on the map then use the glasses to find the exact object you need to examine.
Just on the south side of the road, very near the Prized Kill, you see a fallen semi-circular platform. Kelynn is on the platform, hiding behind a pillar at 3875, 4654. Jump up on the side closest to the ground then step forward and she will attack you!
You will NOT get a location for Lotham to turn in the quest. If he is no longer where you left him, just activate ANY Ancient Wardstone and he will appear.
Patch 1.1 Note: added a map marker for Kelynn Eregor.