After the attack on the Dagon Shrine, Steffan will report that he has seen strange people during dusk hours near the rune stone at the base of the mountain. Both he and Jauffre fear that they are spies and will send the Hero to investigate since they are lacking the manpower to send the Blades into the mountains to hunt for the spies.
Spies"We always see them near the runestone at dusk. They aren't too woodcrafty, but Grandmaster Jauffre had forbidden us to range too far from the walls. But it seems that you have been given the freedom to attack the enemy that we all crave! Good luck. We will keep the Emperor safe here, don't worry."