Researching Patrick and Margaret Cosgrove who lived in MN, late 1860's - 1870's. Patrick immigrated from IRL to NJ where he married Margaret Duffy. They moved west to Houghton County Mich where John, Peter, Michael and Margaret were born. Catherine was born in Lansboro MN. Possibly brothers of Patrick lived in MN also. By 1880 Patrick and Margaret had filed on land in Lake County SD, where they lived the rest of their lives.