THERE were three distinct stages in the evolution of Annette Brougham's attitude towards the knocking in the room above. In the beginning it had been merely a vague discomfort. Absorbed in the composition of her waltz, she had heard it almost subconsciously. The second stage set in when it became a physical pain like red-hot pincers wrenching her mind from her music. Finally, with a thrill in indignation, she knew it for what it was—an insult. The unseen brute disliked her playing, and was intimating his views with a boot-heel. Defiantly, with her foot on the loud pedal, she struck—almost slapped—the keys once more. 'Bang!' from the room above. 'Bang! Bang!' Annette rose. Her face was pink, her chin tilted. Her eyes sparkled with the light of battle. She left the room and started to mount the stairs. No spectator, however just, could have helped feeling a pang of pity for the wretched man who stood unconscious of imminent doom, possibly even triumphant, behind the door at which she was on the point of tapping.