1900 Census
Ferguson        C P              41  Male    Il      IA      Calhoun Lake Crk Twp
1910 Census
Furgeson        Herman D         29  Male    Ia      IA      Calhoun 2-Wd Lake
Firguson        Charles          62  Male    Il      IA      Calhoun Reading Twp
Fargusson       William O        43  Male    Il      IA      Calhoun Union Twp
1920 Census
Fergason        Herman           37  Male    Ia      IA      Calhoun 4-Wd; Lake City
Ferguson        Charles          61  Male    Il      IA      Calhoun 4-Wd; Lake City
Ferguson        Wilbur R         46  Male    Ia      IA      Calhoun Farnhamville; Reading
Ferguson        Fred J           31  Male    Ia      IA      Calhoun Lake Crk
Fargusson       William O        53  Male    Il      IA      Calhoun Union