Treeknee was a Skillmaster. It is not known when he was skill master (or even if he is male or female), or which King he served. He has written many of the skill scrolls that Fitz and Chade are translating.
By order of Skillmaster Treeknee all markings were removed from the Witness Stones, and it is forbidden for any Skill-candidates or novices to go to the Witness Stones unless the Skillmaster accompanies them.
Skillmaster Treeknee ordered that all knowledge of the use of Witness Stones was restricted to those who are candidates for Master status.