I am intimately familiar with this Mark Twain item. A.B. Paine wrote about it briefly in his 1912 Biography, and it is a small collection that Mark Twain himself assembled (patent medicine advertisement & a note by Twain and a dictation signed by him) which came into my possession several years ago. The quote in question, which contains errors from the original dictation hand written by Isabel Lyon and signed by Mark Twain, stems from an autograph dealer that I sold the collection to. The radio broadcast repeated the autograph dealer's errors, namely the incorrect word "Profession" somehow replaced the correct "procession", and the incorrect "gamered" is substituted for the correct "earned." If you read it correctly you will find this makes infinitely more sense. Thus, the radio source was an autograph dealer catalogue. The Twain quoted was an UNMAILED response to the Elixir company , who sought Mark Twain's endorsement for the elixir. Often Twain is at his best this way, writing or dictating letters never intending to actually mail them. I am making these corrections from memory, so there may be more subtle corrections to be made, and my notes aren't handy at the moment. As far as authenticity goes, you can rest assured the item is genuine Mark Twain. I have specialized in Mark Twain's handwriting for nearly two decades, and represent the only business that exclusively deals in rare Mark Twain memorabilia--which is the only entity in the world that offers a double money back authenticity guarantee for handwritten material. Bob Slotta Hilliard, OH