Signs of Treachery?

Recovered from the body of a Forsaken apothecary, this letter hints at an underground correspondence between Undercity and the Grimtotem leadership. "As a demonstration of good faith and a symbol of our newfound trust, we have dispatched Apothecary Cylla to aid you in battling our mutual enemy in the land of Kalimdor. None will stand before our combined might and determination." Perhaps Nazeer Bloodpike in Brackenwall Village will know how to handle this information.