Mary is the third and final child of Edward McCollough and Jane. We know very little about her. Records show she was born in 1817, married HENRY WALKER, a blacksmith April 1, 1856 in St. Georges. He was the son of HENRY and ANN WALKER of Wrighson (Wrightson?), county York, England. We have record of one son born to Mary and Henry, JOHN WILLIAM WALKER, born 8/12/1857 in St. Georges.