Journal of Garlock, warrior

Day 13 - Perran is dead.  I alone must finish our quest.  I have left Perran where he fell as I know of no place to put him to rest.  As for the objects, I placed Rhama's flask, and heard a disembodied voice.  I believe that I have solved one of the six keys!  I believe that the students' slate must be linked to Arath, but cannot determine a link to Triston.  Can it be a piece of armor or a shield?