April 21, 1974 By  LIONEL TRILLING http://www.nytimes.com/books/97/09/21/reviews/jung-freud.html THE CORRESPONDENCE BETWEEN SIGMUND FREUD AND C.G. JUNG Edited by William McGuire. Translated by Ralph Manheim and R.F.C. Hull. The relationship between Sigmund Freud and C. G. Jung had its bright beginning in 1906 and  came to its embittered end in 1913.  Its disastrous course was charted by the many letters the two  men wrote each other.  Of these a few have been lost but there are 360 extant, of which 164 are  from Freud, 196 from Jung.  In 1970 the Freud and Jung families made the enlightened decision  that this correspondence was to be edited as a unit, and it is now…