There's an interesting comment by Hammond and Scull, in regards to 'Concerning... The Hoard', from lotrplaza.com:
Quote:
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With regard to the ruin of Doriath, the story told in the 1964 manuscript is closer to the Quenta Noldorinwa (not published until 1986) than to The Nauglafring in The Book of Lost Tales, but differs in some respects from any published version — for instance, before beginning work on the treasure, the dwarves agree to accept a payment of a tenth of the unwrought metals. Thingol, however, is still killed outside Menegroth, with Tolkien giving two possible reasons why the dwarves were able to pass the Girdle of Melian.
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My emphasis.
It seems that either Hammond and Scull misremembered the text, or, more intriguingly, came to a different conclusion regarding the death of Thingol.
The full quote is found on TG:
https://tolkiengateway.net/wiki/Conc...27The_Hoard%27