First Presidency counselor Jesse Gause and Zebedee Coltrin leave Kirtland on a mission. Jesse never returns. Frederick G. William is later appointed to the First Presidency. Records, including a revelation, are quietly modified to reflect this change.
[Source: Kenney, Scott, Saints Without Halos, "Mormon History 1830-1844," http://web.archive.org/web/20120805163534/saintswithouthalos.com/dirs/d_c.phtml]