There's the quote: "Viewers have a way of remembering the celebrity while forgetting the product. I did not know this when I paid Eleanor Roosevelt $35,000 to make a commercial for margarine. She reported that her mail was equally divided. 'One half was sad because I had damaged my reputation. The other half was happy because I had damaged my reputation.' Not one of my proudest memories. " - David Ogilvy, Ogilvy on Advertising
But that was a few decadesaway. This book predated TV a bit.
