James Bullock
Based on information in Aurelia Spencer Rogers's autobiography (Life Sketches, 1898 ed., 47-50), we conclude that the Bullock family traveled to Utah in the 1848 Brigham Young company. Kenneth C. Bullock, a Bullock family historian, arrived at the same conclusion (A Genealogy of James Bullock and Mary Hill, Latter Day Saint Pioneers, 1964, 4, 9).