Anyone who has studied propagation manuals from ancient to modern times
cannot help but see how methods are carried down from older books to
modern ones. However, in walnut grafting one suspects there were trade
secrets not permitted publication. How different this was from friendly
and helpful cultural and propagation directions given by Mr. J. F.
Jones, Dr. W. C. Deming, Dr. Robert T. Morris, and others of the
Northern Nut Growers' Association.