"Complete file of correspondence received during the period October 1, 1972 through September 30, 1973, including all sorts of mail with answers indicated in certain circumstances. Excluded from this list are a few private documents and financial reports which will be filed as always with the Library of Congress. For the period after September 30, 1973 there will be added at an appropriate later date all subsequent correspondence relating to the publication of this particular novel, even though such correspondence might run into 1976 or later."