10. The Ferruccio Busoni Clue

Robert Plant Conundrum -  Ferrucio Busoni by Umberto Boccioni

Ferruccio (Dante Michelangelo Benvenuto) Busoni (April 1, 1866 – July 27, 1924) was an Italian composer, pianist, editor, writer, piano and composition teacher, and conductor.

Busoni wrote: That which, within our present-day music, most nearly approaches the essential nature of the art, is the Rest and the Hold (Pause). Consummate players, improvisers, know how to employ these instruments of expression in loftier and ampler measure. The tense silence between two movements—in itself music, in this environment—leaves wider scope for divination than the more determinate, but therefore less elastic, sound. --Sketch of a New Esthetic of Music, by Ferruccio Busoni, translated from the German by Dr. Th. Baker

Link: Ferruccio Busoni at Wikipedia