He put on his fur coat and hat and went out into the hall.

There he paused, hearing the slow heavy tread of the policeman on the pavement outside and seeing the flash of the bull's-eye reflected in the window.

He waited and held his breath.
After a few moments he drew back the latch and slipped out, shutting the door very gently behind him.

Then he began ringing the bell.

In about five minutes his valet appeared, half-dressed and looking very drowsy.
"I am sorry to have had to wake you up, Francis," he said, stepping in; "but I had forgotten my latch-key.