To find Archivist Ithimar, start from Lion's Arch and follow either path on the map into the swamp (which is not poisonous). The shorter path is the green path. It is guarded by Image:Necromancer-icon-small.pngBog Skales, while the purple path is guarded mostly by Image:Elementalist-icon-small.pngFire Imps. At point A you will find some ruins on top of which Archivist Ithimar stands.