"Concerning... 'The Hoard'" revealed

[Formendacil]

Originally Posted by Huinesoron

I don't remember any statements that Nargothrond took refugees and treasures from the other kingdoms; that must mean Mithrim, right?

Tiny side-point: Mithrim could certainly be part of the source for the treasure and refugees here, particularly after the Nirnaeth, but it's hardly alone: Nargothrond is the last bastion of the wider Finarfinian realm, and was the last-built part of it--there was Dorthonion and Minas Tirith, each with a Finwëan or two resident, and it's quite probable that there were Elves once settled across West Beleriand who retreated to Nargothrond after the Bragollach, and we're told in the published Silm that the Finarfinians brought the greatest number of treasures with the out of Valinor.

And there's also the Fëanorians: Celegorm and Curufin, obviously, with plenty of indications that some of their people (see: Celebrimbor) and maybe things stayed behind when they were driven out by Orodreth after the death of Finrod.