The messenger and the guards find themselves facing a swollen creek from the previous week's rain and roads turned into swamps across several low-lying areas. In attempting to go through one such mire, the messenger's horse loses its footing and slides down a steep embankment killing both beast and messenger. The guards, knowing their duty, do their best to excavate him. They get him out, but not quick enough. So it is they deliver a very badly damaged letter to Elizabeth on 4.30:
New[...] bandit attack upon the royal party.
Considering your last correspondence, one cannot help but to wonder.
I shall soon depart for Blacktide. I prepar[...] daughter of the king.
If any or all goes awry, know that I am in good health. If such changes, I shall send a message to you. If you do not hear from me in a week's time, send word to Taran who will[...]
Cael Ambrosios, Lord of Iron Shore
They can, at least, verbally inform her of where Lord Taran is.