EDIT: Please ignore this. Turns out it was not this artifact and the real one showed up on my map. I am so sorry.
I'm unable to find the Snotinghamscire Treasure Hoard Map in my Inventory, but the location doesn't show up (as either a cross or a white orb) on my map and when I go to the location, the map isn't there.
The one unobtained artifact on the map is really bugging me. Is there a way to fix this?