"K ... R ..." said the nursemaid, and Septimus heard her say "Kay Arr" close to his ear, deeply, softly, like a mellow organ, but with a roughness in her voice like a grasshopper's, which rasped his spine deliciously and sent running up into his brain waves of sound which, concussing, broke. A marvellous discovery indeed--that the human voice in certain atmospheric conditions (for one must be scientific, above all scientific) can quicken trees into life! Happily Rezia put her hand with a tremendous weight on his knee so that he was weighted down, transfixed, or the excitement of the elm trees rising and falling, rising and falling with all their leaves alight and the colour thinning and thickening from blue to the green of a hollow wave, like plumes on horses' heads, feathers on ladies', so proudly they rose and fell, so superbly, would have sent him mad. But he would not go mad. He would shut his eyes; he would see no more.