Visit the librarians in the following zones within 30 minutes of each other, be visible.
UPDATE: 4715 10-6-2013 Esker The librarian in New Rigel will now have a 100% chance to acknowledge your visit for the mark of Knowledge, up from 75%.
For seeking self-improvement yourself through knowledge, the Powers granted thee a Mark. You have been granted The Mark of Knowledge! You gain 54 practices!
No exp from this mark.
NOTE: the librarian in the keep can not see invis, be visible for that one.