A DC 25 perception check will allow him to identify the sound of two people, heading towards the manor. They sound like they're pretty close; likely close enough to reach the walls in a few seconds. By the time he gets back outside, from armoring up, several minutes later, he'll see the pair of shaggy-looking individuals, heading towards the main gate. While it's hard to tell, since the last time he saw them, it was in the dark of night, but he suspects that they're the weres he met, a few weeks ago.