There is much for the White Company to accomplish in reclaiming Minas Ithil from the remnants of Sauron's forces.
'Many writings are to be found within Ghashan-kútot, the Halls of Black Lore. If you are to venture inside, I ask you to destroy the Morgul manuscripts within. The horrid writing contained to the halls serves only the remnants of Sauron's forces.'
Morgul manuscripts can be found in Ghashan-kútot, the Halls of Black Lore.
You should destroy the Morgul manuscripts.
Destroyed Morgul manuscripts within Ghashan-kútot.