Draco looked toward where Harry glanced. He didn't see anything, but something clearly spooked the boy. "Relax," he said kindly. "Everything is alright." He fished out his wand, summoned the glasses, fixed them with a quick spell, and handed them to Harry. "Good as new." He acted nonchalant, but he was still keeping an eye on Harry and the direction he fled. "Someone what, Harry? Did you see something out there?" If not a ghost, maybe some other magical being or creature he wasn't familiar with?