William McLellin wrote that Joseph translated the leaves of the plates and 3 Witnesses still testify to truth of their experience with plates and angel.

William McLellin

“The Testimony of Men,” an excerpt from W. E. McLellan’s Book, 165-166, circa 1871, in Mitchell K. Schaefer, "The Testimony of Men': William E. McLellin and the Book of Mormon Witnesses," BYU Studies 50, no. 1 (2011): 105-106

BYU Studies
Martin Harris, Mitchell K. Schaefer, David Whitmer, Joseph Smith, Jr., Oliver Cowdery, William McLellin
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In open day light, in an open wood lot, with their sensitive powers all calm and serene, Joseph Smith, Oliver Cowdery, David Whitmer, and Martin Harris testify that an angel of glorified appearance and countenance came down from heaven, and stood before them, and took the the plates which Joseph Smith had possessed, from which he had translated <read <off> the translation of the book> the Book, and held them in his hand, and showed as many of <the> leaves or plates as Joseph had translated <completed>, to them. So that they saw, and looked upon them until they were entirely satisfied. And he <the angel> spoke to David Whitmer and said, “David, blessed is the Lord, and he that keepeth his commandments.” These men saw his form, saw his glorified appearance, heard his words, saw all that he showed them, and then saw him ascend to heaven again. This was no collusion. These men could not be mistaken. They either told the truth, or they wilfully lied. How shall we tell which, how shall we know? This vision was in 1829. More than forty years ago, and what has been the conduct of those men since that day? Two of them are dead— <and probably> two living. Those who are dead testified to the last hour of their lives of to the truth of their vision. Those who are still living are firm in their testimony. I visited David Whitmer after he was more than 65 years of age, and <he> solemnly declared to me “I saw the angel of God, I heard his voice, hence I know of a truth![”] Martin Harris is some over 89 years of age, and still he carries the book of Mormon under his arm, and testifies to all great and small, “I am Martin Harris in all the world, and I know the book of Mormon to be verily true. And although all men should deny the truth of that book, I dare not do it. My heart is fixed. O God, my heart is fixed! I could not know more truly or certainly than I do.”

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