Possible Clues:

• Reward for author's allegiance, having changed sides initially
• Payment to an author — it isn't common
• Performance payment for Queen?
• Payment for the right to use someone else's property
• Tory lay wronged, demanding payment
• Maybe King Priam’s family and Troy lay destroyed
• Kings and Queens
• Maybe Priam's kin in Troy lay rotting
• Princes, for example, demanding author’s share of profits
• Charles and family's percentage of revenue