An interesting discovery

The keg proved short work thanks to lingering effects from the draught of strength that helped you survive the road to Winterhold. On the way down to shut the door, however, a flash of manila caught your eye. A stark contrast to the dingy steps it was wedged between, the scroll was still crisp and relatively clean. Someone must have dropped it quite recently. The broken seal indicated it had already found its recipient, and all but begged to be unfurled:

Enthir,

Last weeks shipment was light. Don't let it happen again. I know black soul gems are a tall order, but they're a small price to pay for immortality, no? We're almost there. Sure, the last subject was turned inside out, but the transfer was a success.

Yours beyond ****,

Nelacar

So, the Altmer was a necromancer...