Oh him, I thought you meant Kalmer.

I get those mixed up.
I just found a treasure-load of stuff.
Oh wait, I got something on him
"Kleunwrade: A Tragedy Observed".
That's just a book, but we now know something happened to him.
Meaning of harbringer.
(SOURCE: E6, Dinner Party, Part II Study, lots of intersting things there.)
RHUE: Here it is.\.\. A harbringer is, "One
who sends others on ahead."
Convo with Castor, Dinner Party, Part I
CASTOR: Have you ever heard about the Landorin Massacre?
RHUE: Yea,\.\. but what do you know of it?
CASTOR: This leaf brought to mind an old legend about the incident that
I heard once.
Many believe that the Landorin Massacre marked the birth of Phantom Slasher.
Others believe it simply marks the Phantom's arrival from the Reaches where the Phantom was most likely born.
RHUE: Born of what?
CASTOR: The Lord Below, the Lord of the Pits, the Evil One, whatever you
like to call him.
How this occurs I do not know. Maybe it doesn't really occur at all.
Perhaps the origins of the Phantom Slasher will never really be known.
Why some people point out the Landorin Massacre as the birth place I do not know.
The Landorin Massacre stands out only because of the lack of remains, and because all of the victims were children.
This is odd especially when you consider that in many massacres
linked to the Phantom Slasher, young children were usually unharmed.
RHUE: That makes for a lot of orphans.
CASTOR: Yep.