And the fog was so dense that they were obliged to travel at quarter speed the entire way.

It was after ten o’clock when he dismissed the motor and entered the dingy little house with the latchkey provided by Pender. He found the hall gas turned low, and a fire in the study. Books and food had also been placed ready by the servant according to instructions. Coils of fog rushed in after him through the open door and filled the hall and passage with its cold discomfort.