Flashman

Wrong: They were last seen in 1850. See the "42nd Annual Report of the Bureau of American Ethnology", pg. 506-507 (https://www.biodiversitylibrary.org/item/107718#page/506/mode/1up). The Creeks (specifically the Iskopogis) had the plates in their possession as late as 1850. They were closely examined by a minister who had heard that they might contain Hebrew: The minister found no evidence of writing save for a stamped "AE". And, though not seen, they were inquired after by one G.W. Grayson in 1917: They apparently still existed, though were in a state of disrepair (pg. 510). The entire account from Swanton I linked to (pg. 503-510) would make interesting reading for any faithful saint, there's a lot of fodder in there: Mention that there were once plates that did contain writing that have been buried, that they were received from a moral teacher, that they were recieved from some mysterious "other" race, etc. I'm surprised Heartlanders are not all over this one: Aside from a few footnote mentions in Sorenson, this forum post seems to be the only discussion extant in LDS circles discussing this incident.