"Summon Barney from your Stable!
With a whistle, you can summon Barney into action! Do so now.
He will appear instantly and follow you as you adventure... protecting you, fighting side-by-side with you!"'Summon Your Companion!' is a quest that can be obtained in the Brackenridge Aqueducts.
- Brackenridge Aqueducts
Go to your Stable and summon Barney.