Did some Mormons crash a horse and buggy into a saloon on that date? Anybody killed?
I guess I don't understand the point you are making.
http://www.google.com/search?q=mountain+meadows+massacre&sourceid=ie7&rls=com.microsoft:en-us:IE-SearchBox&ie=&oe=&rlz=1I7ADRA_enUS475