Arcane Topic Warning: Part the Fifth

[Mithadan]

Mithril would explain things in the Second and Third Ages, and indeed I conceded the likilhood of trade to and from Khazad Dum. But Kuruharan's thesis and the section he quotes is that the Dwarves traded primarily for food and livestock which they could not grow or maintain underground. Beleriand was a long ways away from Khazad Dum, probably too far to transport crops. No doubt the Longbeards traded locally, but trade to Beleriand seems a bit of a stretch, particularly at wartime.

[Aiwendil]

No doubt the Longbeards traded locally, but trade to Beleriand seems a bit of a stretch, particularly at wartime

But it does seem that some trade routes ran all the way from Beleriand out into the east, beyond Khazad-dum (though perishable items probably did not travel that far). In the alliterative Children of Hurin, Beleg is said to have carried wine that came from Dorwinion - a land that is probably far to the east and south of Beleriand (Pauline Baynes's map, which is based on information given to her by Tolkien, places it near the sea of Rhun).