The third in Cage’s series of “Diary” essays (the other parts were published in different contexts), defined broadly as “collections of thoughts that develop out of working and being alive.” The text is formally and discursively roving: its margins, typeface, and color undergo continuous alteration by chance methods as Cage contemplates computers, Satie, life on the road with Merce Cunningham, death, encounters with Mies van der Rohe, Duchamp, and Marshall McLuhan, books, cold remedies, and more. Above all Diary seems to confront the problem of truly ecumenical thought. Dick Higgins, as the original printing technician, meticulously engineered the variations in color, and as such this may be the most outwardly beautiful of the Great Bears.