- Birth Date
- 23 July 1837
- Death Date
- 23 March 1913
Mary arrived in New York on 10 July 1863 via the ship Antarctic. Birth date confirmed by Santaquin Ward records at the time of a rebaptism on 26 July 1863. It is unlikely that the rebaptism date in Santaquin is accurate, seeing as it is only 16 days after their ship landed in New York. She married Thomas Heelis en route.
- Age at Departure: 26
- 1870 Utah Census, Utah County.
- "Mrs. Mary B. Heelis Summoned By Death," Deseret News, 1 Apr. 1913, 10.
- New York Passenger Lists, 1820-1957.
- Perpetual Emigrating Fund, Financial Accounts 1849-1886, Ledger C, p. 627.
- Santaquin Ward, Record of members collection, 1836-1970.
- Utah Death Certificate Index, 1905-1967.