- Birth Date
- 29 April 1849
- Death Date
- 15 November 1928
Niels and his family sailed to the United States on the ship William Tapscott in 1860. He is the son of Jorgen and Oline Mortensen.
- Age at Departure: 11
- European Mission emigration records, Scandinavian Mission, 1852-1920.
- Journal History of The Church of Jesus Christ of Latter-day Saints, Supplement after 31 December 1860, 53.
- Perpetual Emigrating Fund Company general files, 1850-1887.
- Saints By Sea: Latter-day Saint Immigration to America
- "The Immigration," Deseret News, 22 August 1860, 197.