The strain of the last forty-eight hours was too much for her physical strength.

She began to feel, as she lay back in her cushioned chair, that a swoon is no worthy substitute for sleep.

Indeed it had seemed to make the need for sleep even more imperative.
It was all too humiliating! She wanted to think over what had been; to recall it as far as possible so as to fix it in her mind, whilst it was still fresh.

Later on, some action might have to be based on her recollection.

And yet.