• Her obituary indicates she and her family traveled with "Capt. Snow's company" in 1848. Lorenzo Snow was captain of a hundred as part of Brigham Young's 1848 Company. 

Brigham Young Company (1848)

• Age at Departure: 11

Sources

• 1850 Utah Census.
• "First 100, report, 1848 June" in Camp of Israel schedules and reports 1845-1849, Brigham Young's 1848 emigration division.
• "Pioneer and Veteran Called: Mrs. George J. Marsh Closes Honored Career at 72," Deseret News, 4 March 1908, 3.
• Utah Death Certificates.