You can find details on census data at:
https://familysearch.org/search/records/index#count=20&query=%2Bgivenname%3Ahugh%20%2Bsurname%3Acaldwell~%20%2Bbirth_place%3AIdaho~%20%2Bbirth_year%3A1883-1886~%20%2Bresidence_place%3AIdaho~%20%2Bresidence_year%3A1920-1940~
Hugh T Caldwell
United States Census, 1940 birth: 1884 Idaho
residence: 1940 Wendell, West Wendell Election Precinct, Gooding, Idaho, United States
spouse: Wilma Caldwell
children: Robert J Caldwell, Thelma Etta Caldwell
Hugh F Caldwell
United States Census, 1930 birth: 1884 Idaho
census: 1930 Wendell, Gooding, Idaho
spouse: Willa Caldwell
children: Bobby Caldwell, Thelma E Caldwell
Hugh T Caldwell
United States Census, 1920 birth: 1884 Idaho
residence: 1920 , Elmore, Idaho
spouse: Gladys E Caldwell
child: Charlotte V Caldwell
