This paper looks at the Book of Mormon through the lens of library science and the concept of archival provenance. The Nephites cared deeply about their records, and Mormon documented a thorough chain of custody for the plates he edited. However, ideas of archival science and provenance are recent developments in the western world, unknown to biblical authors or to anyone at Joseph Smith's time. Understanding this aspect of Mormon's authorship and Joseph Smith's translation provides additional evidence to the historical validity of the Book of Mormon.