The ring in Numneor

[Thingol]

Hi, its the new guy with another question. There are two conflicting accounts on whether or not Sauron took the ring with him to Numenor. According to the Letters of J.R.R. Tolkien:

"Though reduced to a 'spirit of hatred borne on a dark wind', I do not think one need boggle at this spirit carrying off the One Ring, upon which his power of domination minds now largely depended"

(The Letters of J.R.R. Tolkien #211)

However, in the Akalabeth in the Silm it says:

"...and he came back to Middle Earth and to Mordor that was his home. There he took up again his great Ring in the Baradur"

From what I've read on this board you all would consider what is written in the letters as correct because it was written by Tolkien himself, but I'm curious as to whether or not Chris Tolkien or J.R.R. Tolkien made any more reference to this. I've only read a little of the HoME series, do to the fact that they are expensive and hard to find, so I can't be sure if there are more references to this contradiction.