RFM mentioned the tie pin in his podcast. Here is more information, courtesy of Dan Vogel:
Chapter 4 Slippery Treasures
Nevertheless, Harris also related an instance that occurred shortly after Joseph procured his stone and in which the young scryer demonstrated his abilities. While Harris was sitting on the top rail of one of the Smiths’ fences one day, picking at his teeth with a tie pin and talking with Joseph Jr. and Northrop Sweet, who had married one of Harris’s nieces, Harris accidentally dropped the pin among the straw and shavings on the ground below him. After the three searched for it unsuccessfully, Harris suggested that Joseph use his stone to find it. Joseph took the stone from his pocket, placed it in his “old white hat,” and put his face into the hat. “I watched him closely to see that he did not look to one side,” Harris said. “He reached out his hand beyond me on the right, and moved a little stick, and there I saw the pin, which he picked up and gave to me. I know he did not look out of the hat until after he had picked up the pin.” These proofs separate Smith from the group of self-deluded treasure seers, for they were either true demonstrations of his seeric gift or evidence of his talent for deception. In any event, Harris was persuaded by Smith’s demonstration.
It was NOT real magic!
It was not the Spirit of God!
Tricky Joe had means whereby he could see through the white hat into the grass. Perhaps a trick flap or a hole in the top of the hat in which he could open and see as clear as day. Such a device could also be used to sneak in notes to read the Book of Mormon while translating!
Folks, Joe Smith was a damned fraudster.