Nár is very old even by dwarven standards. He was a friend and esquire to Thrór, King Under the Mountain when Smaug drove the dwarves out of Erebor in T.A. 2770. Nár followed Thrór like many others of the survivors of Durin's Folk of Erebor into exile, and eventually they settled at Zudrugund on the fringes of Dunland. Twenty years later, when Thrór passed the remaining heirlooms of Erebor to his son and set out for the lost halls of Khazad-dûm, Nár alone went with him and so saw first-hand what became of the old king at the hands of Azog. Nár was never the same afterwards. He returned to Zudrugund with news of Thrór's fate, and again after the Sixth War of Dwarves and Orcs, and when Thráin and Thorin removed to eventually find a home in Ered Luin, Nár remained in Zudrugund with only a few others, among them his old friend Hervin Drake-slayer and Hervin's son, Frithgeir. Only recently has Nár returned to the Lonely Mountain, at the invitation of King Thorin III Stonehelm.
Vol. 3, Book 2:
-  Instance: An Echo of Days Past Solo only
Vol. 3, Book 3:
-  Chapter 1: Secrets of Zudrugund
-  Chapter 8: Further Secrets
-  Instance: Attack on Zudrugund
-  Chapter 11: Grief and Insight
Blood of Azog:
-  Blood of Azog: Brethren of Past and Present
-  Blood of Azog: The Sixth War
-  Instance: Nár's Tale
- J.R.R. Tolkien, The Lord of the Rings, Appendix A, "Annals of the Kings and Rulers"
- Chapter 1: Secrets of Zudrugund