> Contrary to what you say, Atlantis did originate with Plato.
>
> There is no separate Atlantis Account. The only account there
> is was invented by Plato himself.
>
>If Plato made it up - which he did - then there cannot be any
> basis for this assumption.
>
> Yes. And it resided in Plato's imagination.

It is true that the primary source for all subsequent Atlantology is "Plato's" text. And it is true that there is no universal consensus peer agreement on any other separate previous texts being related. But it is not proven true that Atlantis only came from Plato's imagination/invention. The site I favour has excellent matches for most of the details of the Account.

> Quote
> The oldest known mentions of an "Atlantic" sea come from
> Stesichorus around mid-sixth century BC (Sch. A. R. 1. 211):[7]
> Atlantikôi pelágei ( ,,, English: 'the Atlantic sea'; etym. 'Sea
> of Atlantis') and in The Histories of Herodotus around 450 BC
> (Hdt. 1.202.4): Atlantis thalassa (Greek: ... English: 'Sea of
> Atlantis' or 'the Atlantis sea'[8]) where the name refers to "the
> sea beyond the pillars of Heracles" which is said to be part of
> the sea that surrounds all land.[9] In these uses, the name refers
> to Atlas, the Titan in Greek mythology, who supported the heavens
> [en.wikipedia.org]

Interesting thanks.
Herodotus came after Solon though before Plato.
There is uncertainty about where the Atlantic sea of the Atlantis Account was/is.
There is uncertainty about where the Pillars of Hercules were/are.
It may be disputed where Atlas was. There is the mountains in nw Africa, but the temple of spheres he built might be Britain or Atlantis. His holding up the earth and heaven could imply a location at ends of earth.
The sea that surrounds all lands is at least not disputed but Atlantis/Atlantic could be anywhere in that world ocean.

> Here, presumably - [earlywritings.com].

It is this one [earlywritings.com] .