In Harvey Einbinder's excellent "The Myth of the Britannica" he includes some of the advertisements used to sell Britannica around 1960 including this one: "HOW CAN YOU EXPRESS THE INEXPRESSIBLE LOVE YOU FEEL FOR YOUR CHILD?" The actual copy, contributed to Dr. D. Alan Walter is not by an eminent child psychologist or educator, but one of the Britannica's salespersons.