The Macmillan Company, 1969, and published as Part I of Afterwords, Anchor Books, 1973. Part H of this book was revised from 37, by John Brockman, Holt Rinehart Winston, 1970, and published as Part II of Afterwords, Anchor Books, 1973. Part HI of this book was published as Part HI of Afterwords, Anchor Books, 1973.