Skyrim:Anonymous Letter (Plague of the Dead)

Someone, please help! A group of Necromancers are experimenting with conjuring Zombies using ancient, dangerous magic, which I fear will have unintended and irreversible consequences. I was expelled from their studies as their ambitions grew into folly, against my warnings.

They're performing a ritual to summon a large group of these foul, uncontrollable creatures as we speak in the southern-most [sic] area of Skyrim, and must be stopped before it's too late!