P. T. Barnum,
The Humbugs of the World — Chapter V
(1866)
“ I was anxious to get a chance of exposing to Adams his weak point, and of showing him the absurdity of telling such ridiculous stories. A fit occasion soon presented itself. One day, while engaged in my office at the Museum, a man with marked Teutonic features and accent approached the door and asked if I would like to buy a pair of living golden pigeons.“Yes,” I replied, “I would like a flock of ‘golden pigeons,’ if I could buy them for their weight in silver; for there are no golden pigeons in existence, unless they are made from the pure metal.” ”
