this infection

We tracked her to a point, then she was lost.
With years that passed, all trace of her was lost.

We thought that we had pinned down where she was.
It did not last. All trace of her was lost.

Someone saw her standing on a bridge.
It happened fast. All trace of her was lost.

They said that was the way that it should be.
The stone was cast. All trace of her was lost.

Isabel, what have you done? How could you?
We stood aghast. All trace of her was lost.