Source: S43House Family of the Mohawk, by Melvin Rhodes Shaver (Ransomville, N. Y., no date)
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSLH-7HV : accessed 26 October 2015), Lena B Cook in household of Oscar F Cook, Mexico Township, Oswego, New York, United States; citing sheet 18B, family 472, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,241,143.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X4T4-MVL : accessed 1 March 2015), Lena B Richards in household of Major M Richards, Parish, Oswego, New York, United States; citing enumeration district (ED) 0049, sheet 5A, family 151, line 49, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1636; FHL microfilm 2,341,370.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K7MR-GZC : accessed 1 March 2015), Lena Richards in household of Major Richards, Parish, Parish Town, Oswego, New York, United States; citing enumeration district (ED) 38-65, sheet 3A, family 60, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 2715.