I am looking for information about a James Alexander, born 1831 in England, arrival in Canada unknown, married Christina Slack (b. 1846, d. 1942) in Dorchester, Ontario. Their daughter Mary Alexander married Silas Clark in Yale, MI, that family moved to Millet, AB. The 1861 Canadian census lists William and Eliza as parents of James, and Stephen and Samuel as brothers. Any information on the families of James Alexander or Christina Slack would be much appreciated.