A group of related families settled in McDonough County, Illinois, among them the Mustains, the Glenns, and the Charters. A lineage chart of the relationships between these families shows the familial relationships, while the census records shows the social relationships in terms of relatives living in different households. For instance, tow of Nathan Mustain’s brothers married into the Charter family, so it’s unsurprising that Jubal Charter can be found as part of his household int he 1860 census. Likewise, his uncle David Glenn, the brother of his mother, Elizabeth LeGrand Glenn.
One connection I had never made was connecting John David Mustain with his wife, Mary Ann Arnott. Part of the issue is that John’s father doesn’t appear in the 1860 census, perhaps because the census official missed his farm or possibly because he was in the process of moving at the time the census was taken. But the 1850 census shows him on his father’s farm. Mary Ann, meanwhile, worked at his uncle’s farm prior to their marriage. This fact allowed me to connect the two correctly and to instead look for Mary Ann’s father, John Arnott, elsewhere, both in place and time.