Joseph and Mary were married in a religious ceremony on January 2nd, 1869 at St. Marys (Oldham) witnessed by Abrahamm Jackson & Richard Mather.1
Marriage/Union Notes
Marriage: 2 Jan 1869 St Mary, Oldham, Lancashire, England Joseph Mather - 20, Book Keeper, Bachelor, Rooden Lane, Prestwich Mary Smith - 21, Spinster, Rooden Lane, Prestwich Groom's Father: Joseph Mather, Weaver Bride's Father: John Smith, Tailor Witness: Abram. Jackson; Richard Mather Married by Banns by: Wm. Walters Register: Marriages 1867 - 1870, Page 151, Entry 301 Source: LDS Family Search
They had a son and a daughter, named Francis Mather and Emily. There are possibly more children.