Joseph Jr. hides the plates across the road in the cooper's shop. During the night the box is found and destroyed by enemies. Smith explains that he had removed plates from the box and placed them in the loft. Lucy Smith says that this event occurred "a few days after" Joseph brought the plates home, and Martin Harris says it was before 1 October.
[Source: Vogel, Dan, Early Mormon Documents, Appendix B: Chronology, 1771-1831, http://amzn.to/T5nY8w]