The Letter for the King

Thiuri is nearly a knight. He only has to complete one test and he will be knighted. He only has to wake one night in the chapel without talking and without opening the door. Then someone knocks at the door of the chapel and asks for help. Risking his knighthood Tiuri opens the door and helps the guy asking for help. Tiuri has to deliver a letter to a knight in the forest which contains an important message for a befriended king. When Tiuri finds the knight, the knight is deadly wounded and asks Tiuri to deliver the letter. Tiuri hesitates, but accepts the mission. The adventure begins.... Will Tiuri deliver the letter on time? And what does the letter say?