When she arrives, the letter is on the table between the two of them. Dara nudges it closer to her, and translates in Mindspeech since Azabel hasn't had that much time yet to learn the Valdemaran script.
...
A message for King Randale of Valdemar. I have observed the redeployment on your Border, and my spies have ascertained that there was an attack in Haven which resulted in the death of a Herald-Mage. I cannot blame you for ascribing it to my work, nor for the precautions you take, and yet I would swear to you, by every star in the sky, that I was not responsible. I have made no decision to betray your Kingdom, and it seems likely that some third power wishes ruin on both of us.
I am aware that it is difficult to prove a negative. However, you will have noticed that the strategic purpose of this attack is unclear, and, as I hope you have reason to believe, I am a careful man and would not act rashly. I can offer you this: my word that I will not interpret your troop movements as a hostile move, but rather a sensible precaution, and that I will not move my own troops while I await your reply. I grant you also the included documents, which I hope you will take as the offers of good faith that I intend.
The signature at the bottom, though, is perfectly legible to Azabel; it's the Kaled'a'in word for 'the night sky'.