Seeking knowledge of my dark cousins can be a deadly task, <name>.
We High Elves hold dear the traditions set down long ago by the Phoenix Kings of ages past. These traditions and rituals sustain our way of life and give us purpose. Our brethren from the west hold no such inhibitions, fully embracing their impulsiveness. The worst amongst them, the devotees of Khaine, have come to Erraneth, but their motives are a mystery.
Seek out their landing, and decipher why it is they scour the ancient ruins of a long dead city.
Particulars
Go northwest to the Witch Elf landing and search for clues to why they are in Erraneth. Return to Lorekeeper Illarhin at Blightsward when done.
Its on the Blighted Isle, when you walk from Chrace stay on the island. Its at the end of the isle. You see a big ship and a tent, just in front of the left side of the tend is the Blood-scribed Parchment.
I didn't catch the coods, but it is on the crates to the left of the opening to the tent where Captain Ekriak (or something similar) is. Towards the northern end of the quest area. Hope this helps.
Oh, and I didn't see it like the first 1000 times I looked for it either.