Well, no. No, in a word. We do have evidence on the Lintha of that era, from Blood and Salt... and...
The Lintha of old had been mighty. Before the gods usurped the Primordials, the Lintha ruled a vast continent. The splendor they produced was without peer, and their works promised to endure for all time. Their patron, Kimbery, the Sea That Marched Against the Flame, whom they called their Great Mother, looked upon the Lintha kindly and taught them to construct synthetic men to send off to war and weapons of the greatest potency to secure their supremacy. Periodically, she rose up from the sea and bore the offspring of a favorite Lintha champion. Even the Dragon Kings could not conquer them, for their home, Lintha Ng Oroo, an island-child of the Great Mother, was ever devious in keeping her Lintha brothers and sisters safe.
But the Exalted rose up against the Lords of all Creation and struck them down, casting those Primordials who were not slain, the Lintha's Great Mother included, into Malfeas, a realm of shame made from the very bones of the Yozi Malfeas. In the midst of the tumult, as the world's very seams came undone, the world of the Lintha was torn asunder. Wars of limitless duration roiled across the land, and elemental chaos swept over the limits of Creation, as the rage and the fury of nature took the Lintha kingdom and scattered it across the sea, tens of thousands meeting their doom without even firm earth to stand upon. Those that fell upon land were taken off as slaves or slain in the wars of men. In an instant, the great civilization of the Lintha was no more. All that remained was Lintha Ng Oroo, now a tiny island herself near death and mad with grief, whose tears melted in with the sea.
Unlike present-day Lintha, the Lintha of old were unusually tall and graceful, with bright green skin and piercing crimson eyes. They had no gills like modern Lintha, though they did pass their long faces and their appreciation for facial jewelry on to their descendants. Centuries of interbreeding with mortals has corrupted their once-noble visage, though certain behavioral traits, such as the Lintha's famous cruelty and sense of superiority, have remained intact.
... well, they were even more Melnibonéan. A sadistic, arrogant, cruel culture of "civilised" island-dwellers who ruled through their "synthetic men" who they sent off to war so they didn't have to fight, and an arsenal of "weapons of the greatest potency" that Kimbery taught them to make.
The Lintha evoke the fantasy novels of the 70s, where there was frequently heavy merging of sci-fi and fantasy, and they're the elves of that kind of novel. They're very much not Fair Folk-style elves.
