Be it known unto all nations, kindreds, tongues, and people, unto whom this work shall come: That Joseph Smith, Jun., the Author and Proprietor of this work, has shewn unto us the plates of which hath been spoken, which have the appearance of gold; and as many of the leaves as the said Smith has translated we did handle with our hands; and we also saw the engravings thereon, all of which has the appearance of ancient work, and of curious workmanship. And this we bear record with words of soberness, that the said Smith has shewn unto us, for we have seen and hefted, and know of a surety that the said Smith has got the plates of which we have spoken. And we give our names unto the world, to witness unto the world that which we have seen. And we lie not, God bearing witness of it.
Unlike the Three Witnesses, the Eight testified that they both saw and handled the plates. Another difference is the Eight testified that they were shown the plates by Joseph Smith, Jr. rather than by an angel as had the Three Witnesses. The call of the Eight probably also illustrates the significant Mormon doctrine of continuous revelation because in Doctrine and Covenants 5: 11-14 (revealed to Joseph Smith in March 1829) the Three Witnesses are told that they will be given power to see the golden plates, "and to none else will I grant this power, to receive this same testimony among this generation." Nevertheless, in 2 Nephi 27:13, the Three are told that "none other...shall view it, save it be a few according to the will of God."
The Eight Witnesses were all members of the Whitmer or Smith families: Christian Whitmer, Jacob Whitmer, Peter Whitmer, Jr., John Whitmer, Hiram Page, Joseph Smith, Sr., Hyrum Smith, and Samuel Harrison Smith. Joseph Smith Sr. was Joseph's father, and Hyrum and Samuel H. Smith were his brothers. Christian, Jacob, Peter Jr. and John were David Whitmer's brothers, and Hiram Page was his brother-in-law.
In 1838, the Whitmer family became estranged from Joseph Smith Jr. during a leadership struggle in Far West, Missouri and all were excommunicated, along with other dissenters, and fled Caldwell County after receiving an ultimatum from the Danites. None of the Whitmers ever rejoined the Church of Jesus Christ of Latter-day Saints. Although none of the Eight Witnesses is known to have denied his testimony to the authenticity of Book of Mormon or the golden plates, in 1838 a former Mormon leader, Stephen Burnett, said Martin Harris had told him that "the eight witnesses never saw [the plates] & hesitated to sign that instrument for that reason, but were persuaded to do it.
In addition to the Three Witnesses and the Eight Witnesses, Mary Whitmer, who took care of the house where much of the translation took place, said that the Angel Moroni showed her the plates as well.