Cousin mine,
Lady Arryn, I wish to personally address you on the matter of succession. We are women, we know which challenges do we face. My father always supported your rule, we were always close, in kindred and spirit. My Lady, if the Vale does stand with me, you shall be properly rewarded, or if you have some demand, be free to ask as much from me. I am not a fool to take loyalty for granted, thus, my Lady, I send this short letter, hoping your heart will stay true to my cause.
In the Light of the Seven,
Rhaenyra, First of Her Name, etc
(signed and sealed. The seal is the traditional Targaryen heraldry quartered with that of Arryn and Velaryon)