Soon afterward, at the Smith farm in New York, eight others were allowed to view and handle the plates: Christian Whitmer, Jacob Whitmer, Peter Whitmer, Jr., John Whitmer, Hiram Page, Joseph Smith, Sr., Hyrum Smith, and Samuel H. Smith. Their signed "Testimony of Eight Witnesses" reports that Joseph Smith showed these eight men the metal plates, which they "hefted" while turning the individual "leaves" and examining the engravings of "curious workmanship." In 1829 the word curious carried the meaning of the Latin word for "careful," suggesting that the plates were wrought "with care and art." Five of these Eight Witnesses remained solidly with the Church; John Whitmer was excommunicated in 1838, and his brother Jacob Whitmer and brother-in-law Hiram Page then became inactive.
Most of these eleven witnesses were members of the large Smith and Whitmer families-families who had assisted in guarding and in translating the ancient record. Not surprisingly, other family members reported indirect contact with the plates and the translation. Young William Smith once helped his brother Joseph carry the plates wrapped in a work frock. Joseph's wife Emma Smith felt the pliable plates as she dusted around the cloth-covered record on her husband's translating table. Burdened with daily chores and caring for her family and visitors working on the translation, Mother Whitmer (Peter Whitmer, Sr.'s, wife) was shown the plates by a heavenly messenger to assure her that the work was of God.
Martin Harris, a prosperous farmer of Palmyra, New York, who had long sought a religion fulfilling biblical prophecy, assisted with the translation previous to his experience as a witness. In 1828 he spent two months transcribing as Joseph Smith dictated the first major segment of Book of Mormon translation-116 handwritten pages. After Martin lost these pages, he wrote no more for the Prophet, but he later financed the publication of the book.
Oliver Cowdery was the main scribe for the Book of Mormon. A schoolteacher, he learned of the gold plates and the translation while boarding with Joseph Smith's parents near Palmyra, New York. In early April 1829, Oliver walked from the Smith home to harmony, pennsylvania, where Joseph Smith was translating. On the way Oliver visited his friend David Whitmer, who also developed an intense interest in the new scripture. When persecution increased in Harmony, David came as requested and moved Joseph and Oliver to his family farm near Fayette (more than 100 miles away), about June 1.
http://eom.byu.edu/index.php/Book_of_Mormon_Witnesses