Which preposition to use with unforgetable

above Occurrences 1%

But two things were always with him as if they had been but yesterday, rising clear and unforgetable above all others, like the two stars in the North that never lost their brilliance.

in Occurrences 1%

Her face was like a plate of fine white porcelain, and the deep eyes filled it with a strange and magnetic pathos; the abundant chestnut hair hung in the precarious support of a thin tortoiseshell; and there was something unforgetable in the manner in which her aversion for the elder woman betrayed itselfa mere nothing, and yet more impressive than any more obvious and therefore more vulgar expression of dislike would have been.

Which preposition to use with  unforgetable