Of the Coming of Men Into the West

[Elvellon]

Also, the inclusion of Ros Note 13 creates a similar problem:

They had crossed Eriador and reached the eastern feet of the Mountains (Ered Lindon) a year or more ahead of all others

is contradicted by:

Nonetheless they did not know that the Lesser Folk had fled from the threat of the Servants of the Dark and gone on westward, while they had lain hidden in their woods, and so under their leader Bëor reached Beleriand at last many years before they did.

Furthermore, Beor reached Beleriand two years before Marach, not "many years before".