The First Tracker gnome, called Tracker gnome 1, is a member of the gnome army who was sent to get co-ordinates of the Khazard forces' HQ on the Battlefield south of Ardougne. The first gnome is present just behind the largest building in the Khazard stronghold on the Battlefield. He is encountered in the Tree Gnome Village quest to get part of the coordinates of the battlefield so the gnomes can fire the ballista. This tracker can be found behind the largest building of the Khazard stronghold (just across the River Dougne from the Battlefield itself).
The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!