Harrison Jones appears as one of several daily npcs who can visit your garrison. He will offer one of six quests as part of the Master Relic Hunter achievement.
The Crystal Reborn
Dream of Argus: The Artificer – Locate Maartun and his journal on the right side of the path just as you enter the Pillars of Fate. You will find his corpse being eaten by two Void Alphas. Read the journal for the next clue.
Dream of Argus: The First Fragment – Kill Lor Stonefist in the nearby cave for the Rough Crystal Shard.
Dream of Argus: The Second Fragment – Kill Vok Blacktongue located in the right runemaster hut just as your enter the main camp. Loot the Cracked Crystal Shard.
Dream of Argus: The Final Fragment – Ride up to the highest peak and kill Koras Soulsplitter for the Smooth Crystal Shard.
Dream of Argus: The Crystal Reborn – Go to the cave overlooking Anguish Fortress (located behind your current location) to restore the Dream of Argus. After placing the shards on the alter, match the runes on the outer, middle and inner rings by spinning each ring until the same rune lines up with each pillar. Collect the reformed crystal and return to your Garrison.
Hand the quest into Rokhan for your 150G reward.