ONE:Mr. Flack shook his head thoughtfully. Presently he got up, walked to the end of the mantelpiece, placed his smoked-out pipe on the edge and took an empty one from behind an ornament. Then he returned to his seat and sat for a long time with the empty pipe in his mouth.His internal organs, heard in action through a stethoscope, resembled the noise made by the humming of a dynamo at full pitch.