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In page Book of Mormon:

"

The first completed manuscript, called the original manuscript, was completed using a variety of scribes. Portions of the original manuscript were also used for typesetting.[citation needed] In October 1841, the entire original manuscript was placed into the cornerstone of the Nauvoo House, and sealed up until nearly forty years later when the cornerstone was reopened. It was then discovered that much of the original manuscript had been destroyed by water seepage and mold. Surviving manuscript pages were handed out to various families and individuals in the 1880s.[4]