"Leaving Winter Quarters with 6 of my teams," tweets Heber C. Kimball -- a man most Mormons know only as a faded, 1800s-era daguerreotype staring out from the pages of a church history manual.
Another well-known (but long-dead) Mormon pioneer tweets a couple hours later to report some horse trouble.
It's not a joke. It's the latest trend in historical re-enactment.