Beacon of Ondylion
From Ondylion to Valholl there is a line-up with beacons. This way when Valholl calls for aid, Ondylion will answer! And this way it's way faster than sending a messenger.
These beacons are guarded by Elon Chorians men. With every beacon comes at least three guards and a wolf. Those wolfs will notice anyone who comes near the beacon uninvited. And if the beacon really is in danger there is a bell. So they can sound the alarm and there will be support in no-time! (yes it's based on lotr )
Other views.
Guards close-up
How does the beacon works: Pile of wood with above that a basket filled with oil. Above the basket is a small fire. If the beacon should be lit, just cut done the rope and there will be a huge fire.