My g-g-grandparents James & Martha Tock (nee Wadd) were living in Lincolnshire, UK, in the 1851 census with their daughter Mary Elizabeth, age 3. Soon after that they emigrated to New Brunswick, where 3 other daughters were born: Annie, Sarah & Emma. I find no trace of Martha in Canada, so not sure if she died before or after the move from the UK, or if she is the mother of the 3 younger girls. James remarried a woman named Margaret and had a son James, then moved with his daughters to California. Would appreciate any information on Martha, especially where and when she died.