Well telling where all of them are exactly would probaly be a waste of your time so I how you can pinpoint their exact location!First go to your logbook then press Lore after that Luminoth Lore Finally hit Keybearers lore.Depending on the color of the Lore,(orange:Agon Wastes,green: Torvus Bog,purple:Temple Grounds and Blue is Sancuary Fortress.) So go to that colors world You'll notice that there is a red bolded word Look around the good side of that place that has that word in it then switch over to the darkside of that same place and that is where it is.(Tip: it will be an flying cache that you can only see with the dark visor,after you hit it once though it will become visible to the naked eye.)