At least one person must have completed The Everling Lockets access quest in order to to open all the doors to get to Lord Everling. You can do the access quest on your way to Everling while you're there.
Steps
Find Hrath's Journal at the Tower of Vhalen in Antonica ( -1300, 38, 45 ) Copy/waypoint -1300, 38, 45.
Go to Nektulos Forest and swim upstream in the Torrent river until you reach ( 465, -3, -1282 ) Copy/waypoint 465, -3, -1282, a bend in the river south of the falls. Can also be updated at the entrance to Commonlands, near the bridge ( -185, -2, 136 ) Copy/waypoint -185, -2, 136
Go to the ocean on the north side of the Commonlands and swim unil you reach ( -859, -196, -1013 ) Copy/waypoint -859, -196, -1013, a dragon skeleton at the bottom of the ocean.
Go back to The Thundering Steppes, to the west coast, and swim past the sirens to ( 1647, -44, 128 ) Copy/waypoint 1647, -44, 128.It will be off the map. So better go ( 1481, -15, 250 ) Copy/waypoint 1481, -15, 250 From there, keep going west and look below, way deep. Look for the front of the ship and go to the part near the broken stairs. When you get close An Enraged Octopus will try to eat you.
A discussion page exists which may contain more information