Yanille watchmen are guards located on the middle floor of the Watchtower on the western end of Yanille. They can be attacked and pickpocketed at level 65 Thieving. Thieving from them yields 60 coins and bread along with 137.5 experience. To get to the middle floor of the Watchtower, you should head west from nightmare zone, outside the wall. If you are inside Yanille, you should then walk North and follow the Northern Wall until you see a tunnel, and then climb through it. After that, walk West to the Watchtower. On the North of the building, you will see a trellis (18 agility required). Climb the trellis, and then you will find yourself on the middle floor of the Watchtower, with some Watchmen walking around.