• William initially traveled to the Salt Lake Valley in the Harry Walton/Garden Grove Company in 1851.

  After attempting to earn some money mining and farming in California, William returned to Utah in the Amasa M. Lyman Company of 1855.

  According to the Jensen's Biographical Encyclopedia, William set out in 1859 to find his father, mother, and brothers. He returned to Utah in 1860 with the John Smith Company.

  In 1862, William married Maria Julia Lusk in Missouri and then traveled with her back to Utah in an unknown company.

  "De Witt" is sometimes spelled "Dewitte."

Harry Walton/Garden Grove Company (1851)

• Age at Departure: 15

Amasa M. Lyman Company (1855)

• Age at Departure: 20

John Smith Company (1860)

• Age at Departure: 24

Company Unknown (1862)

• Age at Departure: 26
• Head of Household

Rescue Companies (1856)

• Age at Departure: 21

Sources

• Andrew Jenson, "Roberts, William D.," Latter-day Saint Biographical Encyclopedia: A Compilation of Biographical Sketches of Prominent Men and Women in the Church of Jesus Christ of Latter-day Saints Volume 1 (Salt Lake City, Utah: The Andrew Jenson History Company, 1971), 498-502.
• "Another Pioneer Answers Last Call," Deseret Evening News, 8 March 1912, 8.
• Crooks, George, [Diary excerpts], in Elna P. Atchison, [Genealogical information on the Crooks family, ca. 1955], 15-16.
• "Death Summons Pioneer at Provo," Salt Lake Tribune, 9 March 1912, 9.
• Journal History of The Church of Jesus Christ of Latter-day Saints, 24 September 1851, 1.
•  Journal History of The Church of Jesus Christ of Latter-day Saints, Supplement after 31 December 1851, 9.
• Journal History of The Church of Jesus Christ of Latter-day Saints, Supplement after 31 December 1860, 46.
• Orson F. Whitey, History of Utah: in Four Volumes, Volume 4 (Salt Lake City, Utah: George Q. Cannon & Sons Co., Publishers, 1904), 388.
• Perpetual Emigrating Fund Company general files, 1850-1887.
• "The Immigration," Deseret News, 15 August 1860, 189.
• Utah Death Certificate Index, 1905-1967.