"One of the mages at Tel Gilan, Saruse Evenas, wants us to destroy the daedra. Not sure why, but there's never a bad reason. You should be able to find it in a cavern named Galseah, which I'm told are just northeast of the Telvanni village of Marog, along the coast, and south of the Helnim Lighthouse. Destroy it, then talk to Saruse at his house for your payment."

"...which I'm told are just northeast of the..." should be "...which I'm told is just northeast of the..."