I am looking for my great-grandfather's siblings. They were all born in Linden Township, Iowa County. Their post office was Mineral Point. The parents were Francis Mullen and Elizabeth Cagoan. The children were John, James, Margaret, Mary and Francis. The period of time the children were born and living in Iowa County was approximately 1860-1880. The parents marriage ended in divorce and the siblings scattered. My great grandfather ended up in Minnesota. His youngest brother Francis may have been in Rockford, Ill. Does anyone know anything about them?