I have nothing to say and I am saying it
Philip Clark: John Cage’s Diary, 15 December 2016
The Selected Letters of John Cage 
edited by Laura Kuhn.
Wesleyan, 618 pp., £30, January 2016,978 0 8195 7591 3 Show More
edited by Laura Kuhn.
Wesleyan, 618 pp., £30, January 2016,
Diary: How to Improve the World (You Will Only Make Matters Worse) 
by John Cage, edited by Richard Kraft and Joe Biel.
Siglio, 176 pp., £26, October 2015,978 1 938221 10 1 Show More
by John Cage, edited by Richard Kraft and Joe Biel.
Siglio, 176 pp., £26, October 2015,
“...  carbon paper, then mail the top sheet back and keep the carbon copy for his own records. Cage’s correspondent was expected to reply inside a box positioned to the right of his message: assuming everyone wrote inside their boxes, and remembered to tear out the carbon paper underneath, the process would result in both parties retaining a complete record of ... ”