1. 1910 US Census, Illinois, Cass, Virginia Precinct, District 28, Sheet 3B, Enumerated 21 April 1910:
Fred Carlson; Head; Age 33; married 12 years; POB Illinois; Father POB Sweden; Mother POB Sweden; Occupation - Farmer; Rents Home
Flora Carlson; Wife; Age 29; Mother of 2 Children, 2 Still Living; POB Illinois; Father POB Illinois; Mother POB Illinois
Howard Carlson; Son; Age 10; POB Illinois; Attends School
Harold Carlson; Son; Age 8; POB Illinois; Attends School

2. From the 1900 US Census, Illinois, Cass, Virginia Precinct (exclusive of city), District 13, Sheet 5B, Enumerated 12 june 1900:
Fred Carlson; Head; DOB March 1877; Age 23; Married 2 years; POB Illinois; Father POB Sweden; Mother POB Sweden; Occupation - Farmer; Rents Home - Farm
Flora Carlson; Wife; DOB Sept 1879; Age 20; POB Illinois; Father POB Illinois; Mother POB Illinois
Howard Carlson; Son; DOB May 1899; Age 1; POB Illinois