Eight Witnesses, Christian Whitmer, Jacob Whitmer, Peter Whitmer, Jr., John Whitmer, Hiram Page, Joseph Smith, Sr., Hyrum Smith, and Samuel H. Smith, visit a grove near the Smith family home in Manchester and have an experience described in a later "Testimony of Eight Witnesses" published as part of the 1830 Book of Mormon. The statement says, with regard to the golden plates, that they "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." There are differing opinions on whether the witnesses believe they had seen the plates in vision, or with their natural eyes. Lucy Mack Smith says that the plates had been carried by this grove by "one of the ancient Nephites." The June 19 date is suggested because Lucy Mack Smith said the event occurred on a Thursday, and that the following Monday, the company went to visit E.B. Grandin to see if he will publish the Book of Mormon.
[Wikipedia: Chronology of Mormonism, http://en.wikipedia.org/wiki/Chronology_of_Mormonism]