She knew that Max saw her go, knew with sure intuition that he would seize the opportunity of her return to secure those few minutes alone with her that he had desired.
She was not mistaken.

He was waiting for her by the baize door that led to the surgery when she emerged.

With a brief, imperious gesture he invited her to pass through.

The door closed behind them, and they were alone together.
"Come along into the consulting-room," said Max.
She turned thither without question.

The room was in darkness.