He hadn't noticed her absence from their bed that night.

If it doesn't work for you, fair enough, we won't notice your absence.

They notice Flora's absence and go to look for her.

He'd barely realized it was there last night, but now he noticed its absence.

It would probably be long after dawn before anyone even noticed their absence.

There should have been an orchestra behind her but no one noticed its absence.

He hurried after the others, who had not noticed his absence.

However, Andy and his mother leave, without noticing their absence.

We did not notice his absence for a long time.

There was still no sign that anyone had noticed her absence.