Samuel Workman, Ire.to Can., mid 1800's

Looking for information about Samuel Workman, b. Aug. 27, 1830, Ireland.Mentioned in obituary for Isaac Workman (d. Oct. 12, 1912, Howard Lake, Minn.) as a surviving brother.Trying to trace the family of John and Anne Nichols Workman, Ireland to Canada.Robert, Isaac, and Rankin came to Minnesota in the 1870's; Samuel apparently stayed in Canada.Would like to learn about him and his family.
Other siblings were Thomas, John, James, Nancy, Marget, and Mary Jane.(all born between 1816 and 1839, Ireland)