'Time and Ageing' Sequence of Composition

[Arvegil145]

Just to make sure that no one missed this, but, Text VI.A has the year of its composition right in the text itself (p. 39):

Men had then existed for 448 VYs + 22 SYs: i.e., 64,534 Sun Years, which, though doubtless insufficient scientifically (since that is only – we being in 1960 of the 7th Age – 16,000 years ago: total about 80,000), is adequate for purposes of the Silmarillion, etc.

- emphasis mine