Hello. I'm trying to find information on a Frank Sell, born about 1875 in Allegheny County, Pa. He was married to a Lula Gardner and by 1910 they had four children: Frank, Agnes, Mary and Reba. By 1920, Lula had remarried but her children with Frank were not living with her. Frank Sell the younger and his sister, Agnes, may have been consigned to an orphanage. What's happened to the other two children and their father is a mystery. They all three seemed to have vanished by 1912. Anyone have any clues?