Her father, George, sailed to America in 1857 on the George Washington. Her mother, Louisa, and two children sailed in 1860 on the Underwriter in 1860. They met her father in New York, and the family came to Utah in 1862.
Her death date is confirmed by her death certificate, which is listed as "Emma L. Jenkins Cook" on the index.
Her father's obituary also talks of the family's travel to Utah.