Ok, many will know of John Cage's seminal (?) 3-movement work for any instrument or combination of instruments titled 4'33" that has no music. It all about listiening to the sound about us in a very Zen Buddhist (or Master Jedi Yoda, if you prefer) fashion. Here's the question: what work preceded this by 33 years and is meticulously scored with only rests? This is easily discoverable using Google/Wikipedia etc. but I wonder if anybody out there knows this.