Inside The Farseers' Settlement is a well, and inside the well is a treasure cube. Toss Mog inside the well to recover AF700 DYING WORLD FRAGMENT - Ultima Brand (03/04) + 800CP !
For the final fragment in this timeline go to the scorched gate in Abyssal Fissure, and head west from it. You'll spot a treasure on an elevation you cannot reach, but Mog sure can. Have him retrieve AF700 DYING WORLD FRAGMENT - Omega Brand (04/04) + 800CP !
Now head for the crystal gate at the southwest edge of the map and activate it with a Wild Artefact to unlock AF100 Bresha Ruins .