• Sidney initially traveled to the Salt Lake Valley in the Brigham Young Company in 1847 and was part of the 4th Company of Ten led by Luke Johnson, according to the company rosters and many journals.  In 1848 he was a Captain of Ten. His birth date is confirmed by his Patriarchal Blessing record.  According to his tombstone he died 10 March 1870; but he was not buried until 23 April 1870 because he had frozen to death while looking for a lost cow and his body was not recovered until then.

Brigham Young Company (1848)

• Age at Departure: 27

Brigham Young Vanguard Company (1847)

• Age at Departure: 26

Sources

• Albert P. Rockwood journals, 1847-1853, Journal, 1847 April-July.
• Elizabeth T. Heward autobiography and journal, 1853-1860, 20-21.
• First 100, report, 1848 June.
• Heber C. Kimball journal in Heber C. Kimball papers, 1837-1866.
• Journal History of The Church of Jesus Christ of Latter-day Saints, Supplement after 31 December 1848, 2.
• Millen Atwood journal, 1847 April-July. 
• Phineas W. Cook reminiscences and journal, 1843-1886, 52-56.
• "The Utah Pioneers," Deseret Weekly, 25 August 1894, 294.
• Thomas Bullock journals, 1843-1849, Journal, 1847 April-June.
• Utah State History Cemeteries and Burials Database.
• William Clayton diaries, 1846-1853, Folder contents: (2) Volume 2, 1847.