On 20 Jun 1830 when Mary was 16, she married Joseph Ferrier (63167) , son of David Ferrier (ca 1755-Oct 1830) & Mary Sabin (55895) (20 Jan 1759-ca 1849), in Markham Township, York County, Ontario. Born ca 1804 in New York. Joseph died in Markham Township, York County, Ontario on 21 Nov 1872.