Many think that Christoph Walker is the one who wrote the note in the quest that drops during the Scourge Invasion.
The note reads:
Tomorrow we make our stand in Andorhal, and I fear this will be my last letter to you, my love. The undead are unfatifued and we, I fear, are only human. We cannot hold against them. But fret not, for although we are sure to perish, our hope stays strong. The light will prevail!
And my dearest, I take comfort knowing that, as those dark terrors storm our walls and crash over us, my last thoughts will not be of death. I will think of you in my arms and I will know peace at last.