The Hlidskjalf reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)
Hlidskjalf
In Norse mythology, Hlidskjalf (also spelt Hlidhskjalf) is Odin's throne where none may sit save Odin himself and his wife Frigg. Whoever sits on it will be able to see everything.