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Source:William Smith:The Old Soldier's Testimony:1884:It was not written from the Spaulding Romance. That story is false
William Smith (1884): "It was not written from the Spaulding Romance. That story is false"
William dismissed the Spalding theory as absurd:
Where is the Spaulding Story? I am a little too old a man to be telling stories. There is no money in telling this story. I expect to stand before angels and archangels and be judged for how I have told it. When Joseph received the plates he a[l]so received the Urim and Thummim, which he would place in a hat to exclude all light, and with the plates by his side he translated the characters, which were cut into the plates with some sharp instrument, into English. And thus, letter by letter, word by word, sentence by sentence, the whole book was translated. It was not written from the Spaulding Romance. That story is false. Some say this romance was stolen by Sidney Rigdon while at Pittsburgh. This is false. Sidney Rigdon knew nothing about it. He never saw or heard tell of the Book of Mormon until it was presented to him by P. P. Pratt and others. He was never at my father's house to see my brother until after the book was published. If he had wanted to see Joseph at that time and remained very long, he would have had to be in the field rolling logs or carrying brush. 
- Dan Vogel (editor), Early Mormon Documents (Salt Lake City, Signature Books, 1996–2003), 5 vols, 1:505-506.