Cailan, I beseech you, as your uncle, not to join the Grey Wardens on the Field. You cannot afford to take this risk. Ferelden cannot afford it. Let me remind you again that you do not have an heir. Your death--and it pains me even to think of it--would plunge Ferelden into chaos.
And yes, perhaps when this is over you will allow me to bring up the subject of your heir. While a son from both the Theirin and Mac Tir lines would unite Ferelden like no other, we must accept that perhaps this can never be. The queen approaches her thirtieth year and her ability to give you a child lessens with each passing month. I submit to you again that it might be time to put Anora aside. We parted harshly the last time I spoke of this, but it has been a full year since then and nothing has changed.
Please, nephew, consider my words, and Andraste's grace be with you.
--A letter from Arl Eamon to King Cailan