Related Clues:

• Knight-clothes?
• Protective plating
• Knight clothing
• Characters in literature
• Written notes
• Characters providing digs?
• Some literature in the post?
• Spear stopper
• Jouster's get-up
• They want tenants with erudition
• Mail for landlords
• There must be hundreds in such correspondence
• They authorise in writing
• They won't prevent you from reading them
• A, B, C, D etc