• The picture of her original gravestone on Family Tree clearly shows her birth date as 16 June 1812, and her date date as 14 January 1856.  (See https://familysearch.org/tree/?cid=lds-FHTopics-ViewTree#view=ancestor&person=L4TH-J7L&section=memories) 

John Brown Company (1851)

• Age at Departure: 39

Sources

• Elias Smith journals, 1836-1888, Journal, 1851 May-1854 October, 13-35 [images 14-36].  
• John Brown Emigrating Company journal, 1851 July-September.
• Journal History of The Church of Jesus Christ of Latter-day Saints, Supplement after 31 December 1851, 6D.