One thing I [Sir William Fairbairn ] however know, and that is that Mr. Halle, in his intensity of thought and his love of the sublime in sound, is the very essence of harmony. In fact, he 'Floats upon sound, and rides upon its echo!' Such were my feelings the other evening as I watched his motions. I perceived that every movement was in unison with a volume of sound, that appeared to descend from the heroic to die in strains of melody upon the ear.