As Araval said:
https://www.tolkiensociety.org/2015/...h-transcribed/
(This map, as I recall, is a fairly recent find).
By the by, Tolkien offered some extensive criticism of Baynes work, perhaps you can find something that from him saying Dorwinion is in the wrong place.
And my '65 Ballantine FotR map has the River-running ending in the Sea of Rhun.
Have you read HoTH?
In addition to what Araval linked to:
"Dorwinion is Sindarin meaning "Young-land country" or Land of Gwinion. (It was probably far south down the River Running, and its Sindarin name a testimony to the spread of Sindarin: in this case expectable since the cultivation of vines was not known originally to the Nandor or Avari."
PE 17, Words, Phrases and Passages in LotR
Hmmm... Named because Sindarin had spread. Not because the Sindar lived there or founded it.
Of course the River-running is shown to end in the Sea of Rhun Not Far Harad.
Oh, wait, this is the route you want to go.
Can you quote me saying that?
I think what I said was:
"Where? The only descriptions of any elves being "swarthy" come from the earliest writings and involve the (far) west of Middle-earth, that is Beleriand, which I think I quoted earlier."
So where? Provide me quotes from Tolkien about all these swarthy elves you are talking about in the central parts of Middle-earth.
While you are at it, provide me quotes about "all the swarthy elves", should be easy to find.
So far it stands at... hmmm... One. Maeglin. And Tolkien changed the description to fair-skinned.
And even had he not, Maeglin is dead. Died before the sinking of Beleriand. And a Gnome/Noldoli/Noldo/Noldo-Sinda/Noldo-Tatyarin Avar depending on variant.
(as I said Eols history is complex).
And I think I said:
"I am not recalling any particular physical description of Elves in the 'central part' of Middle-earth, unless it be from the Awakening and Great March."
You can help my recollection by providing actual quotes from Tolkien.
You have yet to establish "swarthy elves". Quoting Tolkien saying there are these groups of "swarthy elves" dwelling in Beleriand (which would make them Eldar (Noldor/Sindar/Nandorin Laiquendi), rather than Avari, would help.
I'm not interested in your fan-fiction.
Generally I prefer what Tolkien said, over what others claim he says, or their fan-fiction.