Thráin II, King of Durin's Folk, dies in the pits of Dol Guldur
Event Type: Genealogical
Age: 3rd Age - The Stewards
Gandalf again enters Dol Guldur.... He finds Thráin and receives the key of Erebor. Thráin dies in Dol Guldur.
The Return of the King, LoTR Appendix B, The Tale of Years: The Third Age
Only long after was it learned that Thráin had been taken alive and brought to the pits of Dol Guldur. There he was tormented and the Ring taken from him, and then at last he died.
The Return of the King, LoTR Appendix A, Annals of the Kings and Rulers: Durin's Folk
'I remembered a dangerous journey of mine, ninety-one years before, when I had entered Dol Guldur in disguise, and had found there an unhappy Dwarf dying in the pits. I had no idea who he was. He had a map that had belonged to Durin's folk in Moria and a key that seemed to go with it, though he was too far gone to explain it. And he said that he had possessed a great Ring.
'Nearly all his ravings were of that. The last of the Seven he said over and over again. ... [He] gave the map and the key to me. "For my son," he said; and then he died, and soon after I escaped myself. ...
'... [Later] it seemed clear that I had heard the last words of Thráin the Second, though he did not name himself or his son; and Thorin, of course, did not know what had become of his father, nor did he even mention the last of the Seven Rings.'
Unfinished Tales, Part 3, Ch 3, The Quest of Erebor
'How [Thráin] got there I don't know, but I found him a prisoner in the dungeons of the Necromancer.'
'Whatever were you doing there?' asked Thorin with a shudder....
'Never you mind. I was finding things out, as usual; and a nasty dangerous business it was. Even I, Gandalf, only just escaped. I tried to save your father, but it was too late. He was witless and wandering, and had forgotten almost everything except the map and the key.'
'We have long ago paid the goblins of Moria,' said Thorin; 'we must give a thought to the Necromancer.'
'Don't be absurd! He is an enemy quite beyond the powers of all the dwarves put together, if they could all be collected again from the four corners of the world.'
The Hobbit, Ch 1, An Unexpected Party
Elena Tiriel 1Oct05